WATANABE ELECTRIC INDUSTRY AM-756 User manual

Instruction Manual MODEL AM-756 1/20
Enter Mode /
5 1/2 Digit Digital Meter Relay
AM-756
Instruction Manual
WARNING
This symbol indicates instances where
incorrect use may result in death or serious
injury, or cause serious damage to property.
CAUTION
This symbol indicates instances where
improper use may result in injury to the
operator or serious damage to property.
(1) The insulation class of this device is outlined below. Please ensure the
insulation class of this device satisfies your usage requirements before
setting up the device.
Basic insulation
Functional insulation
AC Power
Source
Comparative Output
Input
Sensor Power Source
External Control, BCD Output, Analog Output
DC Power
Source
Comparative Output
Input
Sensor Power Source
External Control, BCD Output, Analog Output
(2) Please do not disassemble this device or make improvements or repairs.
Doing so may cause sudden fire, electrocution or injury.
(3) In order to ensure power to equipment, including this device, is cut in
the event of failure, please ensure an external breaker is installed and
appropriately labeled so that it may be used to cut power to this device
when a malfunction occurs.
(4) In order to prevent device damage and failure, please ensure the voltage
used matches the device’s power rating.
(5) In order to prevent electrocution and device failure, please do not turn
the power on until all wiring has been completed.
(6) Before supplying power to this device, please ensure you check that the
device has been correctly wired. Incorrect wiring may cause device
failure, fire, electrocution or malfunction.
(7) In order to prevent electrocution or fire in the equipment, please check
that there is clearance around the device before activating power.
(8) Please do not touch the terminals while power is being supplied to the
device. Doing so may result in electrocution or malfunction.
･Usage Conditions
Place of Installation: Indoors only
Rated Altitude: 2000m or less
Overvoltage Category: II
Pollution Level: 2
Operating Ambient Temperature and Humidity: 0～50°C 35～85%RH
(Non Condensing)
Vibration (durability): 10 to 55 Hz (Half amplitude 0.15mm)
X, Y, Z directions 30 min.
Impact (durability): 100m/s26 directions, 3 times each
(up and down, forward and back, left to right)
Protective Structure: Equivalent to IP40 (front section)
Connecting Wire Length: Input and output signal lines and control line –less
than 30m in length
･Safety Precautions
(1) Watanabe Electric Industry Co., Ltd assumes no responsibility for any
special damage, indirect loss or passive loss caused by this device.
(2) This device has been developed, designed and manufactured on the
premise that it is to be used as general machinery. Please ensure
attention is paid to safety by adopting such means as a fail-safe design
and a redundancy design, and by conducting regular checks on the
device, particularly when it is being used for purposes such as the
following, where safety is of utmost importance.
•Safety devices used for personal protection
•Rail, aviation and vehicular equipment
•Medical equipment
•Incineration systems, nuclear systems
•Other purposes conforming to the conditions above which require high
levels of safety
(3) Please do not use this device for applications which directly affect
human lives.
(4) When this device is to be used in conjunction with other products,
please check for conformance with specifications, provisions of law and
regulations before use to ensure compatibility.
(5) As the operating life of the comparative output relays varies greatly
depending on switching capacity and conditions, please ensure the
relays are used within their rated load and electrical life. Using
deteriorated relays could result in insulation failure between circuits or
burnout of the relays themselves.
(6) This device requires more than 40 minutes warm up time from when
power is activated in order to operate within its degree of accuracy.
(7) Please do not wipe this device with alcohol, paint thinner, benzene,
acetone or other organic solvents. When wiping the device, please use
a neutral detergent.
･Table of Contents
1 BEFORE USE ..............................................................................................2
2 INSTALLATION..........................................................................................2
3 TERMINAL DESCRIPTION AND CONNECTION METHOD..................3
4 SETTING OF PARAMETERS.....................................................................5
5 EXAMPLE DEFAULT SETTING................................................................8
6 PARAMETER LIST...................................................................................10
7 FUNCTION LIST.......................................................................................14
8 SPECIFICATIONS.....................................................................................18
9 TROUBLE SHOOTING.............................................................................19
10 TIMING CHART......................................................................................19
11 WARRANTYAND AFTER-SALES SERVICE .......................................20
(1) Application of voltage or current exceeding the maximum input
tolerance may damage the device.
(2) Please ensure the voltage used is within the specified voltage range.
Failure to do so may cause fire, electrocution or malfunction.
(3) Please note that the contents of this manual are subject to change
without notice as the product is upgraded.
(4) The information contained herein is considered accurate to the best of
our knowledge. However, should there be any errors or omissions,
please contact the distributor or our company.
(5) After reading this manual, please keep it readily available for future
reference.
Watanabe Electric Industry Co., Ltd.
2022.07 ED-34880e
CAUTION
!
!
WARNING

Instruction Manual MODEL AM-756 2/20
1 Before Use
Thank you for purchasing the AM-756 Digital Meter Relay. Please ensure this
instruction manual is kept on hand for users of this device. Please inspect the
product for any signs of shipping damage and contact your dealer or Watanabe
Electric Industry Co., Ltd if anything comes to your attention.
1-1 Model Configuration
The model configuration of the AM-756 is shown below. Please check that the
product received matches the product ordered.
AM-756-□□-□□-□
Series Name
Comparative
Output
Options
Power 2.
Input
±199.999mV
±1999.99mV
±19.9999V
±199.999V
DV.
±19.9999mA23.
±199.999mA24.
DB.1to 5V 4to 20mA
±199.999mV
12 to 48VDC
100 to 240VAC1.
Off
External control
BCD output (TTL) + external control
BCD output (OC) + external control
Analog output + external control4.
3.
2.
1.
0.
2. Photocoupler output
Relay output1.
Off0.
Basic Model Name
1-2 Accessories
1 instruction manual
1 unit sticker
2 terminal covers for 6P terminal block (attached to main unit for shipment)
2 case attachment bands (attached to main unit for shipment)
･When BCD output is included as an option:
1 connector (8822E-036-171-F (manufactured by KEL))
2 Installation
2-1 Panel Cutout Size
The panel cutout size for mounting the AM-756 Digital Meter Relay is shown
in the diagram below.
Min. 120mm
Min. 70mm
+0.6 -0
45
92 -0
+0.8
2-2 External Dimensions
48
96
91.5
102.5
77
86.5
(97.5)
21.4 11
(0.5)
(2)
ModeEnter /
88.5
2-3 Mounting the Unit on the Panel
1) After removing the mounting bands from the
main unit, please insert the unit from the front side
of the panel.
2) Fix the unit in place from the rear of the panel
using the mounting bands to the left and right.
(1) Panel board thickness should be 0.8 to 5mm.
(2) Please do not install the device in the following locations.
･Locations with sudden changes in temperature resulting in
condensation.
•Locations with corrosive gases (particularly sulfide gas, ammonia
etc.) or flammable gases.
•Locations where the main unit may be subjected to vibration or
impact.
•Locations where the unit may come in contact with water, oil,
chemicals, steam or vapor.
•Locations with high concentrations of dust, salinity or iron particles.
•Locations with large inductive interference resulting in static
electricity, magnetic fields or noise.
•Locations exposed to direct sunlight.
•Locations where heat accumulation from radiant heat and other
sources occurs.
(3) In order to ensure heat dissipation is not obstructed, please allow room
around the device for heat to be released and ensure the device’s
ventilation holes and surroundings are not obstructed. When
installing this device inside other equipment, check the heat release to
ensure the temperature inside the equipment does not exceed 50°C.
(4) Please install this device horizontally.
CAUTION

Instruction Manual MODEL AM-756 3/20
3 Terminal Description and Connection Method
3-1 Rear View
Input unit Comparative
output unit
Optional unit Power unit
3-2 Power Connection
M3 screw terminal (terminal cover included)
NC
Top
Bottom
AC power drive
100 to 240VAC
±10%
12 to 48VDC
±10%
NC
NC
NC
1
2
3
4
5
6
NC
NC
＋
DC power drive
ー
NC
NC
1
2
3
4
5
6
Applicable crimp
terminal
Max. 5.8 Max. 5.8
Top
Bottom
Recommended
torque : 0.5Nm
*NC Terminal: unconnected
3-3 Input Connection
M3 screw terminal (terminal cover included)
3-3-1 DV Range (Direct voltage input)
11 HI
11 LO
14 HI
12,13,14 LO
13 HI
12 HI
1
2
3
4
5
6
Max. 5.8 Max. 5.8
Top
Bottom
Applicable crimp
terminal
Recommended
torque : 0.5Nm
Terminal
No.
Name
Details
1
14 HI
±199.99V input (14 range) + terminal
2
12,13,14 LO
12, 13, 14 range - terminals
3
13 HI
±19.9999V input (13 range) + terminal
4
12 HI
±1.99999V input (12 range) + terminal
5
11 HI
±0.199999V input (11 range) + terminal
6
11 LO
±0.199999V input (11 range) - terminal
The input range settings parameters can be used to change the input range.
* Please do not connect anything to terminals other than those for the range
used.
Factory Setting: 11 ranges (± 0.199999V)
3-3-2 23, 24 Range (Direct current input)
LO
LO
NC
NC
NC
HI
1
2
3
4
5
6
Max. 5.8 Max. 5.8
Top
Bottom
Applicable crimp
terminal
Recommended
torque : 0.5Nm
Terminal
No.
Name
Details
1
NC
Unconnected
* Please do not use these terminals as relay terminals.
2
NC
3
NC
4
HI
+ Terminal
5
LO
- Terminals (connected internally)
6
LO
* Input range settings cannot be made.
3-3-3 DB Range (Process input)
Top
Bottom +EXC
-EXC
2A HI
LO
1V HI
11 HI
1
2
3
4
5
6
Max. 5.8 Max. 5.8
Applicable crimp
terminal
Recommended
torque : 0.5Nm
Terminal
No.
Name
Details
1
2A HI
4 to 20mA(±20mA) input (2A range ) + terminal
2
LO
- terminal
3
1V HI
1 to 5 V (±5V) input (1V range) + terminal
4
11 HI
±0.199999V input (11 range) + terminal
5
+EXC
Sensor power output + terminal
6
-EXC
Sensor power output - terminal
The input range settings parameters can be used to change the input range.
* Please do not connect anything to terminals other than those for the range
used.
Factory Setting: 1V range (±5V)
･Switching Sensor Power Voltage
This device is set to a factory setting of +24V. Therefore, when using the
device at +12V and +10V, please adjust the sensor power voltage according to
the instructions below.
(1) Turn off the device and leave for a minimum period of 10 minutes. Next,
pushing in the upper and lower hooks on the case, pull out the input unit.
Hooks
(also located on bottom) Input unit
(1) Please ensure supply voltage is within device’s power rating and that
power-up and cut-off are instantaneous.
(2) Please wait for ten seconds or more before activating power each time.
(3) Please do not use the NC terminals as relay terminals.
(1) Units may not be changed by the customer.
(2) Do not use different models of these units.
CAUTION
CAUTION

Instruction Manual MODEL AM-756 4/20
(2) Switch the sensor power switch socket as shown in the diagram below.
+12V
+24V
+10V
CN3
DB range input unit
Sensor power
switch socket
+24V +12V +10V
(3) After completing the switch, install the input unit according to the guides
found on the interior of the main unit case.
(4) Connect the input unit connector (female) to the main unit connector
(male) ensuring they are firmly connected.
3-4 Comparative Output Connection
3.81mm pitch European terminal board
3-4-1 Relay Output
HH a
1
2
3
4
5
6
7
8
9
10
HH c
HI a
HI c
GO a
GO c
LO a
LO c
LL a
LL c
Adaptable wire: AWG24 to 16
Length of stripped wire: 6 to 7mm
Top
Bottom
Recommended torque : 0.18Nm
Terminal
No.
Name
Details
1
HH a
HH Output relay a-contact terminal
2
HH c
HH Output relay COM terminal
3
HI a
HI Output relay a-contact terminal
4
HI c
HI Output relay COM terminal
5
GO a
GO Output relay a-contact terminal
6
GO c
GO Output relay COM terminal
7
LO a
LO Output relay a-contact terminal
8
LO c
LO Output relay COM terminal
9
LL a
LL Output relay a-contact terminal
10
LL c
LL Output relay COM terminal
3-4-2 Photocoupler Output
HH C
1
2
3
4
5
6
7
8
9
10
HH E
HI C
HI E
GO C
GO E
LO C
LO E
LL C
LL E
Top
Bottom
Adaptable wire: AWG24 to 16
Length of stripped wire: 6 to 7mm
Recommended torque : 0.18Nm
Terminal
No.
Name
Details
1
HH C
HH Output photocoupler Collector terminal
2
HH E
HH Output photocoupler Emitter terminal
3
HI C
HI Output photocoupler Collector terminal
4
HI E
HI Output photocoupler Emitter terminal
5
GO C
GO Output photocoupler Collector terminal
6
GO E
GO Output photocoupler Emitter terminal
7
LO C
LO Output photocoupler Collector terminal
8
LO E
LO Output photocoupler Emitter terminal
9
LL C
LL Output photocoupler Collector terminal
10
LL E
LL Output photocoupler Emitter terminal
3-5 Option Connection
3-5-1 External Control
3.81mm pitch European terminal board
S/H
1
2
3
4
5
6
7
8
9
10
PH
DZ
R.RES
PSEL0
PSEL1
PSEL2
COM
NC
NC
Top
Bottom
Adaptable wire: AWG24 to 16
Length of stripped wire: 6 to 7mm
Recommended torque : 0.18Nm
Terminal
No.
Name
Details
1
S/H
Start/Hold control terminal
2
PH
Peak hold control terminal
3
DZ
Digital zero control terminal
* Becomes effective when parameters settings are set to
external control
4
R.RES
Relay reset control terminal
5
PSEL0
Pattern select control terminals 0 to 2
* Becomes effective when parameters settings are set to
external control
6
PSEL1
7
PSEL2
8
COM
External control common terminal
9
NC
Do not connect anything to these terminals.
Please do not use NC terminals as relay terminals.
10
NC
3-5-2 BCD Output + External Control
1.27mm pitch, one-touch insertion/ejection, 2 piece connector (manufactured
by KEL)
Receptacle Section: 8822E-036-171-F (manufactured by KEL)
(accompanying item)
1048
1042
1038
1032
1028
1022
1018
1012
1051
1044
1041
1034
1031
1024
1021
1014
1011
1004
1008
1002
1001 POL
OVER PC
D.COM D.COM
ENA S/H
PH DZ
PSEL0
PSEL2
COM
R.RES
PSEL1
COM
Receptacle section adaptable wire
1.27mm pitch universal flat cable
(AWG28)
1
2
3536
Top
Bottom
Please turn off the device and wait for a minimum of 10 minutes before
commencing any work on the device. Failure to do so may result in
electrocution or fire.
CAUTION

Instruction Manual MODEL AM-756 5/20
Terminal
No.
Name
Details
Terminal
No.
Name
Details
1
COM
External control common
terminal
19
1008
BCD
data
output
2
COM
20
1011
3
PSEL2
Pattern select control
terminals 0 to 2 *1
21
1012
4
PSEL1
22
1014
5
PSEL0
23
1018
6
R.RES
Relay reset control terminal
24
1021
7
DZ
Digital zero control terminal
*1
25
1022
8
PH
Peak hold control terminal
26
1024
9
S/H
Start/Hold control terminal
27
1028
10
ENA
BCD enable input
28
1031
11
D.COM
BCD common terminals
29
1032
12
D.COM
30
1034
13
PC
BCD printing command
signal
31
1038
14
OVER
BCD over range output
32
1041
15
POL
BCD polarity output
33
1042
16
1001
BCD data output
34
1044
17
1002
35
1048
18
1004
36
1051
*1 Becomes effective when parameters settings are set to external control
3-5-3 Analog Output + External Control
3.81mm pitch European terminal board
S/H
1
2
3
4
5
6
7
8
9
10
PH
DZ
R.RES
PSEL0
PSEL1
COM
VOUT+
IOUT+
AO-
Top
Bottom
Adaptable wire: AWG24 to 16
Length of stripped wire: 6 to 7mm
Recommended torque : 0.18Nm
Terminal
No.
Name
Details
1
S/H
Start/Hold control terminal
2
PH
Peak hold control terminal
3
DZ
Digital zero control terminal
* Becomes effective when parameters settings are set to
external control
4
R.RES
Relay reset control terminal
5
PSEL0
Pattern select control terminals 0, 1
* Becomes effective when parameters settings are set to
external control
* PSEL2 Terminal is permanently OFF
6
PSEL1
7
COM
External control common terminal
8
VOUT+
Analog output (voltage) + terminal
9
IOUT+
Analog output (current) + terminal
10
AO-
Analog output - terminal
4 Setting of Parameters
4-1 Component Names and Functions
Enter Mode /
HH
HI
GO
LO
LL
RE
PH
DZ
TZ P3
P2
P1
ME
1 2 3
4 5 6 7
No.
Name
Main Functions
During Measurement
Mode
During Settings Mode
1
Comparative
Output Display
Displays comparative
judgment results
Extinguished
(Comparative output OFF)
2
Main Display
Displays measurement
values
Displays group name,
parameters, set values
3
Function
Indicators
RE
Unused
PH
Lights up when peak hold control terminal is activated
DZ
Lights up when digital zero function is activated
TZ
Lights up when tracking zero function is activated
ME
Lights up when digital zero backup is activated
P1
P2
P3
Pattern select function pattern number indicator
(Refer to chart below)
4
Enter Key
Switches to setting mode
(long key press)
Return, cancels changes to
set values
5
Mode Key
Switches to maximum /
minimum value display
(long key press)
Select,
Enter
6
Shift / Decrement
Key
Digital zero control *1
(long key press)
Shifts to the next parameter
down,
Changes number of digits in
settings
7
Increment Key
Switches pattern select
number(long key press) *1
Shifts to the next parameter
up,
Positive settings
*1 Function becomes effective when the parameters are set to enable front
panel key settings
･Pattern Number Display
Pattern No.
P1 Display
P2 Display
P3 Display
1
-
-
-
2
P1
-
-
3
-
P2
-
4
P1
P2
-
5
-
-
P3
6
P1
-
P3
7
-
P2
P3
8
P1
P2
P3
4-2 Display and Character Representations
Indications on the main display and their corresponding characters are as
follows.
0
1
2
3
4
5
6
7
8
9
-
/
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
RR
S
T
U
V
W
X
Y
Z
+
&
4-3 Parameter Groups
The parameters are classified into the following groups in accordance with
their main objectives. When changing the parameters, bring up the display
for the group to which the parameter in question belongs.
No.
Group Name
Setting Details
Group Classification
1
Input
Condition data
2
Function
3
Display
4
Display scaling
Pattern data *3
5
Comparative output *1
6
Option*2
Condition data
７
Linearize
8
Protect
-
9
Monitor
*1 The “COM” group is not displayed when there is no comparative output.
*2 The “OPT” group is not displayed when there is no option, and during
external control.
*3 Some “COM” group parameters are classified as condition data.

Instruction Manual MODEL AM-756 6/20
4-4 Shifting to Parameter Setting Mode
The basic operating system for checking parameter setting values is shown in the diagram below.
* The diagram below uses the AM-756-DV- 41 operating system (voltage input, analog output + external control, relay output) as a typical example.
Some of the parameters and values displayed below may not be displayed for other ranges.
3sec
Enter
Enter
/
Mode
/
/
Mode
Mode
/
Enter
Mode
or
/
Mode
Enter
Mode
or Mode
Enter
Mode
or
Mode
Enter
Mode
or Mode
Enter
Mode
or Mode
Enter
Mode
or
/
/
/
/
/
Mode
/
Mode
Enter
Mode
or Mode
Enter
Mode
or Mode
Enter
Mode
or
/
Mode
Enter
Mode
or
Mode
Mode
Enter
Mode
Enter
Mode
or
/
Mode
Enter
Mode
or
/
ModeEnter
Mode
Enter
Mode
or Mode
Enter
Mode
or
// /
/
Mode
Mode
Enter
Mode
or
/
Mode
Enter
Mode
or
/
Mode
Enter
Mode
or
/
ModeEnter
Mode
Enter
Mode
or
/
Mode
Enter
Mode
or
/
ModeEnter
Mode
Enter
Mode
or Mode
Enter
Mode
or
// /
/
Next page
/
Enter
Enter
Enter
Enter
Enter
Mode
3sec Mode Mode
Mode
Enter
Input range Averaging frequency Moving average
Pattern number S/H type PH type
Pattern control method
Maximum value Minimum value Max. - Min. value
Display update cycle Display blank Display color
MET pattern 1 MET pattern 8
Digital limiter 1 Digital limiter 8
Full scale
display 1
Full scale
display 8
Comparative
output type
Comparative
output latch Comparative output delay
COM
pattern 1 COM pattern 8
HH comparative
value 1 LL hysteresis 1 LL hysteresis 8
Maximum/minimum value mode
Measurement mode
Settings mode
Flashing Flashing
/
Mode
Enter
Mode
or
/
Dead zone
Flashing
HH comparative
value 8

Instruction Manual MODEL AM-756 7/20
/
/
/
Mode
Enter ModeEnter
/
ModeEnter
/
ModeEnter ModeEnter
Mode
Enter
/ /
Mode
Enter
Mode
or Mode
Enter
Mode
or Mode
Enter
Mode
or
/
Mode
Enter
Mode
or
Mode
/ /
Mode
Enter
Mode
or Mode
Enter
Mode
or Mode
Enter
Mode
or Mode
Enter
Mode
or
/
Mode
/
Mode
Enter
Mode
or Mode
Enter
Mode
or Mode
Enter
Mode
or
/ /
/ /
Enter
Enter
Previous Page
AO type AO 100%
display value
AO 0%
display value
Linearize LINE input value 1 LINE output value 1 LINE output value 16
Settings protect Changes protect DZ protect MM protect
Process value Input unit Comparative
output unit
Control terminals
5 - 7
/
* Key-repeat will occur when the or keys are held down.
4-5 Changing Parameter Settings
The diagram below shows the basic operating system for changing parameter settings.
(1) Number Set Value
/ / / /
･Changes number of digits in settings
Move the digit point by pressing the key.
/
/
For a five digit setting:
･Changing Values
Increase the value of the flashing digit by 1 by pressing the key.
Key-repeat will occur when the key is held down.
･Changing Polarity
Press the key when the most significant digit is at its maximum value.
* Key-repeat will occur when the key is held down.
For a six digit setting:
* The polarity will not change when negative settings are not possible.

Instruction Manual MODEL AM-756 8/20
(2) Other Changes
･Changing Values (Fixed numerical values, name display)
The set values can be changed one parameter at a time by pressing the or key.
Key-repeat will occur when the keys are held down.
E.g. MAV Setting Value
/
/////
/
･Changing Values (Decimal point)
Pressing the or key moves the decimal point one space at a time.
Key-repeat will occur when the keys are held down.
/
/ / / / /
/
(No decimal point)
(3) Enter/Cancel
･Entering Changes to Set Values
Pressing the
Mode
key after set values have been changed sets the changed values and saves them to the E2PROM.
N.B.) Please do not turn off power to the device while the E2PROM is saving data.
The display will return to the parameter name display.
N.B.) If the display does not return to the parameter name display even upon pressing the
Mode
key, this indicates that the changed set value exceeds the
possible settings range. In this case, please change the value so that it falls within the range or cancel the setting change.
･Canceling Changes to Set Values
Pressing the
Enter
key during the changing of a set value cancels the value change.
The set value will revert to the value preceding the change.
The display will return to the parameter name display.
5 Example Default Setting
As a typical example, the default position setting for the AM-756-DV- 0-1 (voltage input, no option, relay output) is shown.
･±19.99999V range (13 ranges), 1 to 5V input is displayed as 0.00 to 100.00.
･Comparative output HH ON when display exceeds 80.00, comparative output HI ON when display exceeds 60.00.
･Comparative output LL ON when display is less than 10.00, comparative output LO ON when display is less than 30.00.
Measurement values
10.00
ON
ON
ON
ON
ON
HH
HI
LO
LL
GO
30.00
60.00
80.00
Display
Input
100.00
0.00 1.000V 5.000V
Comparative
output
The default position is set using the following procedure.
5-1 Power On
(1) Check that all wiring to the device is correct.
(2) Turn on the power.
(3) Wait until the measurement values are displayed.
5-2 Range Settings
The input range setting value will be changed to "13".
3sec
Enter Mode Mode Mode
Twice Enter

Instruction Manual MODEL AM-756 9/20
5-3 Displaying Scaling Settings
(1) Set the full scale display value to "10000".
Mode
3 times Mode Mode
/
Change the set value
using the above keys
,
Mode
(2) Set the full scale input value to "5.000".
Mode Mode
/
Change the set value
using the above keys
,
(3) Change the offset display value to "0". (As the default value is "0", this will not be changed.)
Mode
Check value is correct
Enter
(4) Change the offset input value to "1.000".
Mode Mode
/
Change the set value
using the above keys
,
(5) Set the position of the decimal point to "0.00".
Mode Mode
3 times Enter Enter
5-4 Comparative Output Settings
(1) Set the Comparative Output HI Comparative Value to "60.00".
(As the setting condition is HH > HI, the value of HH cannot be lower than the value of HI. Therefore, enter the HI value first.)
Mode 3 times Mode
/,
Change the set value
using the above keys
Mode Mode
(2) Set the comparative output HH comparative value to "80.00".
Mode
/ /
Change the set value
using the above keys
,Mode
(3) Set the comparative output LO comparative value to "30.00".
Mode /
Change the set value
using the above keys
,Mode
Twice
(4) Set the comparative output LL value to "10.00".
Mode /
Change the set value
using the above keys
,Mode
5-5 Return to Measurement Mode
Return to measurement mode and commence measurement.
Enter Enter Enter
Measurement mode

Instruction Manual MODEL AM-756 10/20
6 Parameter List
6-1 Group
Menu
Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
Input range
(DV range)
11: ±199.999mV
12: ±1999.99mV
13: ±19.9999V
14: ±199.999V
11
Sets the input range.
* Input terminals differ according to the range.
Input: DV
(Voltage
input)
Input range
(2 range)
23: ±19.9999mA
24: ±199.999mA
Depends
on
purchased
range
Confirms the input range.
N.B.) Settings cannot be changed.
Input: 2
(Current
input)
Input range
(DB range)
1V: 1 to 5V (±5V)
2A: 4 to 20mA (±19.9999mA)
11: ±199.999mV
1V
Sets the input range.
* Input terminals differ according to the range.
When settings are changed, the full scale input value and offset
input value are rewritten and saved to the E2PROM.
N.B.) Parameter settings cannot be made while changed
settings are being saved to the E2PROM.
Input: DB
（Process）
Averaging
frequency
1: 1 time (50 times/sec)
2: 2 times (25 times/sec)
5: 5 times (10 times/sec)
20: 20 times (2.5 times/sec)
50: 50 times (1 time/sec)
100: 100 times (0.5 times/sec)
1
Sets the number of averaging times for measurement data
(sampling rate).
Sampling constantly occurs at 50 times/ sec, and this data is
averaged by the set number of times.
*The values in parenthesis are the sampling rates.
-
MovingAverage
OFF: OFF
2: 2 times
4: 4 times
8: 8 times
16: 16 times
32: 32 times
OFF
Sets the number of moving averaging times for the measurement
data.
-
Digital Zero
Backup
OFF: Backup off
ON: Backup on
OFF
Sets whether to back up the digital zero value to the E2PROM
when digital zero is activated.
-
Digital Zero
Control Method
INT: Front panel keys
EXT: External control terminal
INT
Sets the digital zero control method.
Option: any
apart from
NO
Digital Zero
Value
-199999 to 199999 [digit]
0
Sets the digital zero value when digital zero is ON.
N.B.) If settings are made while digital zero is OFF, they will be
updated when digital zero is turned ON.
-
Tracking Zero
Correction Time
0 to 99 [sample]
0
Sets the correction time of the tracking zero function when digital
zero is used.A setting of 0 disables tracking zero.
Correction Time (sec) = Set Value × 0.02 × AVG Set Value.
-
Tracking Zero
Correction Width
1 to 99 [digit]
1
Sets the correction width of the tracking zero function when digital
zero is used.
-
Step Wide
1: 0 to 9
2: 0, 2, 4, 6, 8
5: 0, 5
10: 0
1
Sets the variation width of the least significant digit displayed.
* The numbers that can be displayed as the least significant digit
are shown after the setting values.
-
Dead Zone
0 to 9999 [digit]
0
Displays input from 0 to ± (set range) as 0.
-
6-2 Group
Menu Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
Pattern Select
Control Method
INT: front panel keys, parameter
EXT: External control terminal
INT
Sets the pattern select control method.
Option: any
apart from
NO
Pattern Number
1 to 8
1
Sets the pattern number to be used.
N.B.) Settings cannot be made when PSEL = “EXT”.
-
Start/Hold Type
A: Free Run
B: One Shot
A
Sets how the Start/Hold control terminal function is to be
activated.
Option: any
apart from
NO
Start/Hold
Delay
0 to 999 [sample]
0
Sets the delay time from when the Start/Hold control terminal is
put into start mode until the signal is read.
Delay time (sec) = Set value × 0.02 ×AVG Set value
Peak Hold Type
Select
PH: Peak hold
VH: Valley hold
PVH: Peak valley hold
PH
Sets the type of HOLD for the peak hold control terminal function.
Peak Hold Type
A: Real display
B: Result display
A
Sets how HOLD is activated for the peak hold control terminal
function.

Instruction Manual MODEL AM-756 11/20
6-3 Group
Menu Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
Display Update
Cycle
SSLO: 1 time/sec
SLO: 2 times/sec
MID: 10 times/sec
FAST: 20 times/sec
MID
Sets the main display update cycle.
-
Display Blank
HIGH: Bright
MID: Medium
ON: Main display extinguished
HIGH
Sets the display brightness and extinguishes the main
display.
-
Display Color
(Comparative
output off)
GRN: Green
RED: Red
GRN
Sets the main display color.
Comparative
output: Off
Display Color
(Comparative
output on)
GRN: Green
RED: Red
GO.GRN: GO is green, other
readouts are red
GO.RED: GO is red, other readouts
are green
GO.GRN
Sets the main and comparative output display colors.
Comparative
output: Relay,
photocoupler
6-4 Group
Menu Display
Parameter Name
Description Display
Conditions
to
Scaling Patterns
1 to 8
Switches to the parameter settings for scaling patterns 1 to
8.
-
･Scaling Pattern 1 to 8 Parameters
Menu Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
to
Full-scale
Display Values
1 to 8
-199999 to 199999
199999
Sets the value displayed when input is full-scale input values.
-
to
Full-scale Input
Values 1 to 8
Changes according to input
range.
*See chart below.
See chart
below.
Sets the input value when the full-scale display value is
displayed.
-
to
Offset Display
Values 1 to 8
-199999 to 199999
0
Sets the display value when input is offset display values.
-
to
Offset Input
Values 1 to 8
Changes according to input
range.
*See chart below.
See chart
below.
Sets the input value for offset display values.
-
to
Decimal Point
Positions 1 to 8
No decimal point,
XXXXXX. to X.XXXXX
No
decimal
point
Sets the position of the decimal point.
-
to
Digital Limiter
HI 1 to 8
-199999 to 199999
199999
Sets the upper limit of the displayable range. When the
measured value is greater than the set value, the displayed
value will be limited by the set value.
-
to
Digital Limiter
LO 1 to 8
-199999 to 199999
-199999
Sets the lower limit of the displayable range. When the
measured value is less than the set value, the displayed value
will be limited by the set value.
-
･FIN, OIN Setting Ranges for Each Input Range
Input Range
Set Value
Input Range
Full Scale Input Value FIN 1 to 8
Offset Input Value OIN 1 to 8
Setting Range
Default Value
Setting Value
Default Value
11
±0.2V
-0.20000 to 0.20000
0.20000
-0.20000 to 0.20000
0.00000
12
±2V
-2.0000 to 2.0000
2.0000
-2.0000 to 2.0000
0.0000
13
±20V
-20.000 to 20.000
20.000
-20.000 to 20.000
0.000
14
±200V
-200.00 to 200.00
200.00
-200.00 to 200.00
0.00
23
±20mA
-20.000 to 20.000
20.000
-20.000 to 20.000
0.000
24
±200mA
-200.00 to 200.00
200.00
-200.00 to 200.00
0.00
1V
±5V
-5.0000 to 5.0000
5.0000
-5.0000 to 5.0000
1.0000
2A
±20mA
-20.000 to 20.000
20.000
-20.000 to 20.000
4.000
N.B.) When the input range setting is changed using DB Range (process input), all FIN and OIN setting values revert to their default values and are
saved to the E2PROM.

Instruction Manual MODEL AM-756 12/20
6-5 Group
Menu Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
Comparative
Output Type
NRML: Normal output
ZONE: Zone output
NRML
Selects comparative output type.
* Condition data group
Comparative
output:
Relay,
photocoupler
Comparative
Output Latch
OFF: Latch function off
ON: Latch function on
OFF
Holds status (latches) when comparative output judgment is a
judgment other than GO. Latch can be cancelled with the following
procedure:
1. Go to parameter settings mode.
2. Turn the relay reset control terminal ON.
* Condition data group
Comparative
Output Delay
0 to 99 [CNT]
0
Sets the length of time actually taken for comparative judgment output
to deactivate when comparative judgment switches from ON to OFF.
Delay time (msec) = Set value × 20msec
* Condition data group
to
Comparative
Output Patterns
1 to 8
-
-
Switches to the parameter settings for comparative output patterns 1 to
8
･Comparative Output Pattern 1 to 8 Parameters
Menu Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
to
HH Comparison
Set Values
1 to 8
-199999 to 199999
N.B.) Settings may be made within
identical patterns under the
following conditions.
S-HH > S-HI > S-LO > S-LL
100000
Measurement value >= HH set value →HH output ON
* Decimal point position depends on the decimal point
position in identical patterns.
Comparative
output:
Relay,
photocoupler
to
HI Comparison
Set Values
1 to 8
50000
Measurement value >= HI Set value →HI output ON
* Decimal point position depends on the decimal point
position in identical patterns.
to
LO Comparison
Set Values
1 to 8
-50000
Measurement value <= LO set value →LO output ON
* Decimal point position depends on the decimal point
position in identical patterns.
to
LL Comparison
Set Values
1 to 8
-100000
Measurement value <= LL set value →LL output ON
* Decimal point position depends on the decimal point
position in identical patterns.
to
HH Hysteresis
1 to 8
0 to 9999
0
Measurement value < (HH set value –HH Hysteresis) →
HH output OFF
* Decimal point position depends on the decimal point
position in identical patterns.
to
HI Hysteresis
1 to 8
Measurement value < (HI set value –HI Hysteresis) →HI
output OFF
* Decimal point position depends on the decimal point
position in identical patterns.
to
LO Hysteresis
1 to 8
Measurement value > (LO set value + LO Hysteresis) →
LO output OFF
* Decimal point position depends on the decimal point
position in identical patterns.
to
LL Hysteresis
1 to 8
Measurement value > (LL set value + LL Hysteresis) →LL
output OFF
* Decimal point position depends on the decimal point
position in identical patterns.
6-6 Group
Menu Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
Analog Output Type
0-10: 0 to 10V output
1-5: 1 to 5V output
0-1: 0 to 1V output
4-20: 4 to 20mA output
0-10
Selects output type when analog output selected.
Option: Analog
output
Analog Output 100%
Display Value
-19999 to 199999
199999
Sets display value when analog output is 100%.
Analog Output 0%
Display Value
-19999 to 199999
0
Sets display value when analog output is 0%.
BCD Output Logic
NEG: Negative logic
POS: Positive logic
NEG
Selects BCD output logic.
* Open collector is normal.
Option: BCD
output
6-7 Group
Menu Display
Parameter Name
Setting Range
Default Value
Description
Display Conditions
Linearize Point
OFF: Linearize Off
2: 2-point correction
4: 4-point correction
8: 8-point correction
16: 16-point correction
OFF
Selects Linearize function ON/OFF and number of
correction points.
-

Instruction Manual MODEL AM-756 13/20
Menu Display
Parameter Name
Setting Range
Default
Value
Customer
Setting
Value
Description
Display
Conditions
Linearize Input
Value 1
-199999 to 199999 [digit]
Setting Condition: N02i > N01i
0
Input Value 1: Linearize pre-correction
display
Output Value 1: Linearize post-correction
display
LINE set
value:
2, 4, 8, 16
Linearize Output
Value 1
-199999 to 199999 [digit]
Setting Condition: N02o > N01o
0
Linearize Input
Value 2
-199999 to 199999 [digit]
Setting Condition: N03i > N02i > N01i
1000
Input Value 2: Linearize pre-correction
display
Output Value 2: Linearize post-correction
display
Linearize Output
Value 2
-199999 to 199999 [digit]
Setting Condition: N03o > N02o > N01o
1000
Linearize Input
Value 3
-199999 to 199999 [digit]
Setting Condition: N04i > N03i > N02i
2000
Input Value 3: Linearize pre-correction
display
Output Value 3: Linearize post-correction
display
LINE Set
Value:
4, 8, 16
Linearize Output
Value 3
-199999 to 199999 [digit]
Setting Condition: N04o > N03o > N02o
2000
Linearize Input
Value 4
-199999 to 199999 [digit]
Setting Condition: N05i > N04i > N03i
3000
Input Value 4: Linearize pre-correction
display
Output Value 4: Linearize post-correction
display
Linearize Output
Value 4
-199999 to 199999 [digit]
Setting Condition: N05o > N04o > N03o
3000
Linearize Input
Value 5
-199999 to 199999 [digit]
Setting Condition: N06i > N05i > N04i
4000
Input Value 5: Linearize pre-correction
display
Output Value 5: Linearize post-correction
display
LINE Set
Value:
8, 16
Linearize Output
Value 5
-199999 to 199999 [digit]
Setting Condition: N06o > N05o > N04o
4000
Linearize Input
Value 6
-199999 to 199999 [digit]
Setting Condition: N07i > N06i > N05i
5000
Input Value 6: Linearize pre-correction
display
Output Value 6: Linearize post-correction
display
Linearize Output
Value 6
-199999 to 199999 [digit]
Setting Condition: N07o > N06o > N05o
5000
Linearize Input
Value 7
-199999 to 199999 [digit]
Setting Condition: N08i > N07i > N06i
6000
Input Value 7: Linearize pre-correction
display
Output Value 7: Linearize post-correction
display
Linearize Output
Value 7
-199999 to 199999 [digit]
Setting Condition: N08o > N07o > N06o
6000
Linearize Input
Value 8
-199999 to 199999 [digit]
Setting Condition: N09i > N08i > N07i
7000
Input Value 8: Linearize pre-correction
display
Output Value 8: Linearize post-correction
display
Linearize Output
Value 8
-199999 to 199999 [digit]
Setting Condition: N09o > N08o > N07o
7000
Linearize Input
Value 9
-199999 to 199999 [digit]
Setting Condition: N10i > N09i > N08i
8000
Input Value 9: Linearize pre-correction
display
Output Value 9: Linearize post-correction
display
LINE Set
Value:
16
Linearize Output
Value 9
-199999 to 199999 [digit]
Setting Condition: N10o > N09o > N08o
8000
Linearize Input
Value 10
-199999 to 199999 [digit]
Setting Condition: N11i > N10i > N09i
9000
Input Value 10: Linearize pre-correction
display
Output Value 10: Linearize post-correction
display
Linearize Output
Value 10
-199999 to 199999 [digit]
Setting Condition: N11o > N10o > N09o
9000
Linearize Input
Value 11
-199999 to 199999 [digit]
Setting Condition: N12i > N11i > N10i
10000
Input Value 11: Linearize pre-correction
display
Output Value 11: Linearize post-correction
display
Linearize Output
Value 11
-199999 to 199999 [digit]
Setting Condition: N12o > N11o > N10o
10000
Linearize Input
Value 12
-199999 to 199999 [digit]
Setting Condition: N13i > N12i > N11i
11000
Input Value 12: Linearize pre-correction
display
Output Value 12: Linearize post-correction
display
Linearize Output
Value 12
-199999 to 199999 [digit]
Setting Condition: N13o > N12o > N11o
11000
Linearize Input
Value 13
-199999 to 199999 [digit]
Setting Condition: N14i > N13i > N12i
12000
Input Value 13: Linearize pre-correction
display
Output Value 13: Linearize post-correction
display
Linearize Output
Value 13
-199999 to 199999 [digit]
Setting Condition: N14o > N13o > N12o
12000
Linearize Input
Value 14
-199999 to 199999 [digit]
Setting Condition: N15i > N14i > N13i
13000
Input Value 14: Linearize pre-correction
display
Output Value 14: Linearize post-correction
display
Linearize Output
Value 14
-199999 to 199999 [digit]
Setting Condition: N15o > N14o > N13o
13000
Linearize Input
Value 15
-199999 to 199999 [digit]
Setting Condition: N16i > N15i > N14i
14000
Input Value 15: Linearize pre-correction
display
Output Value 15: Linearize post-correction
display
Linearize Output
Value 15
-199999 to 199999 [digit]
Setting Condition: N16o > N15o > N14o
14000
Linearize Input
Value 16
-199999 to 199999 [digit]
Setting Condition: N16i > N15i
15000
Input Value 16: Linearize pre-correction
display
Output Value 16: Linearize post-correction
display
Linearize Output
Value 16
-199999 to 199999 [digit]
Setting Condition: N16o > N15o
15000
N.B. 1) Setting data cannot be changed when the input of data falling outside the setting conditions is attempted. Please commence settings from the first or last
linearize point.
N.B. 2) Occasionally, when changing the number of linearize points, linearize correction may not occur correctly if the setting conditions are not fulfilled. Please
ensure that the linearize input and output values fulfill the setting conditions before commencing measurement.

Instruction Manual MODEL AM-756 14/20
6-8 Group
Menu Display
Parameter Name
Setting Range
Default
Value
Description
Display
Conditions
Settings Protect
OFF: Display all
PATN: No pattern display
COND: No condition display
ALL: All displays off
OFF
Hides parameters of set group.
* For parameter groupings, please refer to "Parameter
Settings Group".
-
Set Value
Changes Protect
OFF: Set values can be changed
ON: Set values cannot be changed
OFF
Enables/disables changes to set parameter values. Even if set
value change is disabled, display of the values is possible.
-
Digital Zero
Protect
OFF: Digital Zero enabled
ON: Digital Zero disabled
OFF
Limits the digital zero function of the front panel keys.
*The external control digital zero function is not limited.
-
Maximum
Minimum Values
Protect
OFF: No limit
CLR: Limit clear function
CNG: Limit display switching
OFF
Limits switching between maximum and minimum values
and value reset.
-
6-9 グループ
Menu Display
Parameter Name
Setting Range
Description
Display Conditions
Process Value
-199999 to 199999
Indicates the measurement value before PH
* Display only. Settings cannot be made.
-
Input Unit
DV: Direct voltage input
A: Direct current input
DB: Process input
Indicates the input unit currently connected.
* Display only. Settings cannot be made.
-
Comparative
Output Unit
NONE: No comparative output
PHOTO: Photocoupler output
RELAY: Relay output
Indicates the comparative output unit currently
connected.
* Display only. Settings cannot be made.
-
Optional Unit
NONE: No optional unit
C IN: Control terminal
BCD: BCD output
A.O: Analog output
Indicates the optional unit currently connected.
* Display only. Settings cannot be made.
-
External Control
Terminals
1 to 4
0: OFF, 1: ON
4th bit: R:RESET
3rd bit: PSEL0
2nd bit: PSEL1
1st bit: PSEL2
Indicates the status of the external control terminal.
* Display only. Settings cannot be made.
* PSEL2 is permanently OFF during analog output.
Option: Any other
than NO
External Control
Terminals
5 to 7
0: OFF, 1: ON
3rd bit: S/H
2nd bit: PH
1st bit: DZ
7 Function List
7-1 Measurement
7-1-1 Input
(1) Input Range ( , , Parameters)
Input Set
Value
Input
Range
Possible Display
Range
Resolution
11
±0.2V
Approx. ±0.21V
±199999
12
±2V
Approx. ±2.1V
13
±20V
Approx. ±21V
14
±200V
Approx. ±210V
23
±20mA
Approx. ±21mA
24
±200mA
Approx. ±210mA
1V
±5V
Approx. ±5.25V
2A
±20mA
Approx. ±21mA
N.B.) Please do not connect unused terminals.
(2) Over range Warning
The main display will read or under the following
conditions.
･The value input is outside the possible display range.
･The measured value exceeds ±199999.
7-1-2 Scaling Function
Measurement values can be obtained using input values converted into
arbitrary display values. Scales are converted by using the scaling setting of
the currently selected pattern.
･Parameters Used: to , to ,
to , to
･Calculation Formula
The scaling calculation formula is as follows.
Measurement
value
FSC - FIN
OFS - OIN × + ( )
OFS - OIN × FSC－FIN
OFS - OIN
=Input
value
* Negative scaling settings (reverse gradient) are also possible.
7-1-3 Digital Limiter Function
This function sets the upper and lower limits of the displayable range.
It is limited by the digital limit values of the presently selected pattern.
When the measurement value is greater than the set upper limit, the displayed
value is limited by the set upper limit.
Upper Parameters: to
When the measurement value is less than the set lower limit, the displayed
value is limited by the set lower limit.
Lower Parameters: to
7-2 Noise Elimination
7-2-1 Averaging Frequency
Measurement data obtained at 50 times/ sec is averaged at an interval set by
the sampling rate. Measurement values, comparative output, analog output and
BCD output are updated with their average values.
Parameter Used:
7-2-2 MovingAverage
Data which has been averaged by using the sampling rate interval is in turn
averaged by the quantity of set data. With every sampling, the oldest data is
discarded and new data is obtained and averaged.
Parameter Used:
7-3 Measurement Value Correction
7-3-1 Digital Zero
(1) Digital Zero
The current measurement value can be shifted to zero by using either the
external control terminal or front panel keys. When digital zero is on, the
digital zero function is active, and when digital zero is off, the device runs on
normal operation. When the digital zero function is on, the function message
[DZ] illuminates, enabling visual confirmation of the operating status.

Instruction Manual MODEL AM-756 15/20
(2) Digital Zero Control Method
This enables selection of whether digital zero is controlled by using the
external control terminal or the front panel keys.
Parameter Used:
(3) Digital Zero Using Front Panel Keys
DZ Function ON
3 sec/
DZ Function OFF
3 sec/
Measurement Mode
N.B.) Digital zero function cannot be activated with the front panel keys when
the device is in setting mode or maximum minimum value mode.
(4) Digital Zero Value
The digital zero value used when the digital zero function is activated can be
set arbitrarily. The set value is saved into the E2PROM.
Parameter Used:
(5) Digital Zero Backup
The digital zero value used when the digital zero function is active can be
saved to the E2PROM. In addition, when the digital zero backup is activated, if
the power is turned on while the device is in digital zero control mode,
measurement will commence using the saved digital zero value.
Parameter Used:
N.B.) If the device is being used while alternating between the activation
and deactivation of digital zero, please ensure the digital zero backup is
turned off.
7-3-2 Tracking Zero Function
(1) Tracking Zero
This function measures values within the set tracking zero correction width,
and when it reaches the number of samples set under tracking zero correction
time, it converts the value of the last data measured to zero. If any of the
measured values falls out of the correction range, the tracking zero function
will not activate.
N.B.) The tracking zero function starts functioning when digital zero is
activated.
Sampling (6 times)
0
Digital zero ON
+1
+2
+3
+4
+5
-1
-2
-3
-4
-5
Tracking zero
Tracking zero
Sampling (6 times)
Measurement value
Correction
width
±3
Tracking zero
commences
Tracking zero Settings
Correction time TR T: 6
Correction width TR W: 3
(2) Tracking Zero Correction Time
This function sets the tracking zero correction time. When the correction time
is set to zero, the tracking zero function is inactive. When the correction time
is set to one or more the function indicator [TZ] will illuminate.
Parameter Used:
Correction Time (sec) = TR T set value × 0.02 × AVG set value
E.g.) Tracking zero correction time (TR T) 50 [sample]
When AVG is 10:
Tracking correction time: 50 × 0.02 × 10 = 10 sec
(3) Tracking Zero Correction Width
This function sets the tracking zero correction width.
Tracking zero is activated when:
- (Tracking zero correction width) <= Measurement value <= + (Tracking zero
correction width)
Parameter Used:
7-3-3 Step Wide Function
This function changes the resolution of the least significant digit of the
measurement value in order to prevent display drift.
Parameter Used:
7-3-4 Dead Zone Function
This function displays ± (set range) from zero as "zero" in order to prevent
display drift around zero.
Parameter Used:
7-3-5 Linearize Function
(1) Linearize
This function executes approximate line calculation at set points and corrects
the measured values in order to correct input nonlinearity.
Input values which fall outside the set linearization range are output with no
alteration.
Parameter Used: , to , to
･Example setting
Display
Input
n02o: 20.00
n01o: 10.00
20.00
n01i
n03o: 60.00
n04o: 90.00
LINE set value: 4
50.00
n02i
70.00
n03i
110.00
n04i
110.01
N.B.) If the linearize point changes do not fulfill the setting conditions,
linearize correction may not execute correctly.
Please ensure that linearize input and output values fulfill the setting
conditions before commencing measurement.
7-4 Comparative Output
7-4-1 Comparative Output Type
This function compares the measured values with the set comparative values
and outputs the comparative output.
Setting Condition: HH judgment value > HI judgment value > LO judgment
value > LL judgment value
Either normal or zone output can be selected.
Parameter Used:
･Normal Output
Measurement value
S-LL set value
ON
ON
ON
ON
ON
Comparative output HH
Comparative output HI
Comparative output LO
Comparative output LL
Comparative output GO
S-LO set value
S-HI set value
S-HH set value
Comparative Output
Output OFF →ON Conditions
HH
Measurement value >= set value
HI
Measurement value >= set value
GO
HH, HI, LO, LL all OFF
LO
Measurement value <= set value
LL
Measurement value <= set value
･Zone Output
ON
ON
ON
ON
ON
S-LL set value
Comparative output HH
Comparative output HI
Comparative output LO
Comparative output LL
Comparative output GO
S-LO set value
S-HI set value
S-HH set value
Measurement value
Comparative
Output
Output OFF →ON Conditions
HH
Measurement value >= set value
HI
set value >= Measurement value >= set value
GO
HH, HI, LO, LL all OFF
LO
set value <= Measurement value <= set value
LL
Measurement value <= set value
7-4-2 Hysteresis
When comparative output changes from ON to OFF, if there is no variation in
the measurement values exceeding the set hysteresis range, this function
prevents the output from switching OFF. Hysteresis is not activated when
comparative output changes from OFF to ON.

Instruction Manual MODEL AM-756 16/20
Measurement
value
Comparative
set value
HH or HI
Comparative
set value
LO or LL
ON
ON
Comparative
output
HH or HI
Comparative
output
LO or LL
Hysteresis
Hysteresis
Time
Comparative Output
Output OFF →ON Conditions
HH
Measurement value < ( －)
HI
Measurement value < ( －)
GO
One of HH, HI, LO, LL is ON (No Hysteresis)
LO
Measurement value > ( + )
LL
Measurement value > ( + )
7-4-3 Comparative Output Deactivation Delay Function
When the comparison results function is deactivated, this function will switch
the comparative output deactivation delay ON for the set time duration only,
then switch OFF.
Parameter Used:
Delay Time (msec): RLD set value × 20msec
7-4-4 Comparative Output Latch Function
When comparative output reads any judgment other than GO, this status will
be saved (latched).
Parameter Used:
To deactivate the latch function, please follow the following steps.
(1) Go to parameter setting mode.
(2) Turn the relay reset control terminal ON.
7-4-5 Comparative Output Reset Function
This function can be used to turn all comparative output results OFF using the
relay reset control terminal.
7-5 External Control Terminal Function
7-5-1 External Control Terminal Specifications
ON voltage: 0 to 0.8V
OFF voltage: 4.5 to 5V
Input current:
Max. -3mA
･Please ensure that the supplied control terminal input is no-voltage contact
input.
･When inputting with a transistor or similar device, please connect the device
using open-collector output.
･As the contact current is low, please ensure a terminal for minute electric
currents is used for contact input.
7-5-2 Peak Hold Function
(1) Peak Hold
This function can hold the maximum value (PH), minimum value (VH) or the
difference between the maximum and minimum values (PVH) during
measurement. Peak hold can be controlled with the external control terminal.
Parameter Used:
(2) Operation Type
There are two peak hold types; Type A (real display) and Type B (result
display).
Parameter Used:
･Type A: This operation type commences peak hold measurement when peak
hold terminal is activated, and updates the peak hold value at each
sampling rate. When peak hold terminal is deactivated, peak hold
measurement ends and the device returns to routine measurement.
･Type B: This operation type updates peak hold values stored while peak hold
terminal is OFF when peak hold terminal is activated, and saves the
peak hold values until the next update.
7-5-3 Start/Hold Function
(1) Start/Hold
This function enables control over the commencement and ending of
measurement using the external control terminal.
(2) Operation Type
There are two Start/Hold operation types; Type A (free run) and Type B (one
shot).
Parameter Used:
･Type A: This operation type enters hold status when Start/Hold is ON, halting
measurement. The comparative, analog and BCD outputs save the
values recorded before HOLD was activated.
･Type B: This operation type executes one measurement only when Start/Hold
switches from OFF to ON, updating the comparative, analog and
BCD outputs. A HOLD status is maintained for everything else.
Measurement values are only updated once, even if Start/Hold is
switched on more than once during the sampling time.
(3) Start/Hold Response Time
Max. (10msec + (20msec ×AVG set value))
(4) Start Delay
When the Start/Hold function is being used, it is possible to delay the
commencement of measurement for a set period of time.
Parameter Used:
Start Delay Time (msec) = S/H.D set value × 20msec × AVG set value
7-5-4 Pattern Select
The external control terminal or front panel keys can be used to switch
between the 8 comparative setting value patterns, hysteresis and scaling
setting values.
(1) Pattern Select Method
Pattern select may be executed using the external control terminal, the front
panel keys or through parameter settings.
Parameter Used:
(2) Pattern Select: Using Front Panel Keys
3 sec
Pattern 1
Measurement mode
Pattern 2 Pattern 3 Pattern 8
3 sec 3 sec 3 sec
3 sec
N.B.1) Even if pattern numbers are changed using the front panel keys, they
will not be saved to the E2PROM.
N.B.2) The front panel keys may not be used for the pattern select function
method during setting mode or maximum minimum value mode.
(3) Pattern Select: Using Parameter Change
When the pattern selection method is set to “INT,” the set values can be
changed using the parameter pattern numbers. When the set values are
changed, the pattern number is saved to the E2PROM and the set pattern is
activated at the next start-up.
Parameter Used:
(4) Parameter Select: Using Control Terminal
When the control terminal is used for pattern select, the patterns used can be
switched by turning the pattern select control terminals ON and OFF.
Selected Pattern No.
PSEL0 Terminal
PSEL1 Terminal
PSEL2 Terminal
1
OFF
OFF
OFF
2
ON
OFF
OFF
3
OFF
ON
OFF
4
ON
ON
OFF
5
OFF
OFF
ON
6
ON
OFF
ON
7
OFF
ON
ON
8
ON
ON
ON
7-6 Display
7-6-1 Main Display Update Cycle
The main display update cycle can be changed. The display update cycle and
sampling rate are not related.
Parameter Used:
7-6-2 Display Blank
This function changes the display brightness and extinguishes the main
display.
When the main display is extinguished, the comparative output display and
function display will illuminate.
Parameter Used:
+5V
Control
section
AM-756
Control
terminal
COM
Input Current

Instruction Manual MODEL AM-756 17/20
7-6-3 Display Color
This function enables the display color of the main display and comparative
output display (only when comparative output is activated) to be set.
When comparative output is activated, different colors can be set for when
there is and is not a GO judgment.
* The color displayed during relay reset will be the GO judgment color.
Parameter Used:
7-6-4 Status Display
The status of measurement values, the input unit, the comparative output unit,
the option unit and the external control terminal can be checked with the
setting mode.
Parameters Used: , , , , ,
7-7 Other Functions
7-7-1 Protect
This function enables the setting of whether or not parameters are displayed or
set, the limiting of digital zero functions using the front panel keys and the
maximum and minimum value function limits.
Parameters Used: , , ,
7-7-2 Maximum and Minimum Values
(1) Maximum and Minimum Values
The maximum value, minimum value and the difference between the
maximum and minimum values of the values measured can be confirmed
using maximum and minimum value mode.
For details on displaying this data, please refer to the section entitled "Shifting
to Parameter Setting Mode."
N.B. 1) Maximum and minimum values are for display only. This data
cannot be output using comparative output, analog output or BCD output.
N.B. 2) The maximum displayable value for the difference between the
maximum and minimum values is 199999. Any values exceeding this will
be displayed as 199999.
(2) Clear Maximum and Minimum Values
Pressing the MODE key in maximum and minimum values mode for longer
than three seconds enables the resumption of maximum and minimum value
measurement with the maximum and minimum values reset.
7-7-3 Set Value Reset
All set values will be initialized when the device is started up while pressing
the ENTER and MODE keys.
Initialization takes approximately 30 seconds. Please do not turn off the
device during initialization. The initialization process cannot be stopped once
activated.
The message " " will blink on the main display during initialization.
When the initialization of the setting values is complete, the device will revert
to measurement mode.
7-8 Output
7-8-1 BCD (Binary Coded Decimal) Output
(1) BCD Output
BCD type measurement values are output from this device at intervals set by
the sampling rate.
BCD Output Type
ON or “1”
OFF or “0”
Open collector
Transistor ON
Transistor OFF
TTL
+5V
0V
N.B. 1) The settings of each output are undefined at start up.
N.B. 2) Open collector output is NPN open collector output.
N.B. 3) When the computed result is "WAIT", the data output will be
"000000".
(2) Over range Signal (OVER)
Output is activated when OVER is displayed.
(3) Polar Signal (POL)
Output is activated when the measurement value is negative.
(4) Print Command Signal (PC)
The print command signal is activated when BCD data output is complete and
the output data has been determined. The length of time the signal is activated
differs according to the averaging frequency setting.
Averaging Frequency (times)
1
2
5
10 ,20, 50, 100
PC ON Time (msec)
10
20
50
100
(5) BCD Enable Input (ENABLE)
When the ENABLE terminal and D.COM are shorted, data output, the over
range signal, the polar signal and print command signal are all deactivated.
ON Voltage: 0 to 0.8V
OFF Voltage: 4.2 to 5V
Input Current: Max. -0.5mA
(6) BCD Output Logic
The function is used to select BCD Output logic.
* The only signal where logic is not inverted is the PC signal.
BCD Output Type
Logic Setting NEG
Logic Setting POS
Open Collector
Negative logic
Positive logic
(PC: Negative logic)
TTL
Positive logic
Negative logic
(PC: Positive logic)
Parameter Used:
7-8-2 Analog Output
(1) Analog Output
This function enables output of voltage and current values using measurement
values converted using analog output scaling.
N.B. 1) Analog output is 0% during settings mode or when the measurement
value is "WAIT".
(2) Analog Output Type
Analog Output Type
Output Range
0% Output
Value
100% Output
Value
0 to 10V
Approx. -0.5 to 10.5V
0V
10V
1 to 5V
Approx. 0.8 to 5.2V
1V
5V
0 to 1V
Approx. -0.05 to 1.05V
0V
1V
4 to 20mA
Approx. 3.2 to 20.8mA
4mA
20mA
N.B. 1) When measurement values fall out of the analog output range, output
will be limited by the analog output range.
N.B. 2) The analog output will output measurement values converted by
analog output scaling even when the OVER message is displayed.
Parameter Used:
(3) Analog Output Scaling
This function enables the output of arbitrarily converted measurement values
as analog output values. The scale is converted using the analog output scaling
setting of the selected pattern.
･Calculation Method
The analog output scaling calculation is as follows:
Analog Output Value =100% Output Value - 0% Output Value
AOHI－AOLO × Measurement Value
+ 0% Output Value –AOLO ×
(100% Output Value - 0% Output Value
AOHI－AOLO )
* Negative (reverse gradient) scaling settings are also possible.
E.g.) 5V output when 16.0000 is displayed, 1V output when -12.0000 is
displayed
A.OUT set value: 1 to 5, AOHI set value: 16.0000,AOLO set Value: -12.0000
Output (V)
Measurement
value
16.0000
5.0
5.2
-13.4000
-12.0000-19.9999 19.9999
17.4000
0.0000
1.0
0.8

Instruction Manual MODEL AM-756 18/20
8 Specifications
･Input Specifications
Measurement function: Direct voltage / Direct current
Operating system: Δ∑ Conversion system
Input circuit: Single-ended type
Resolution: ±199999
Sampling rate: 50 times/ sec
Display: Offset ±199999, Full Scale ±199999
･DV Range (Direct Voltage Input)
･2 Range (Direct Current Input)
Range
Measurement
Range
Accuracy
(23±3°C, 35 to 85%RH)
Input
Impedance
Maximum
Allowable
Input
23
±19.9999mA
±(0.04% of rdg + 10digit)
Approx. 10Ω
±50mA
24
±199.999mA
±(0.06% of rdg + 10digit)
Approx. 1Ω
±500mA
･DB Range (Process Input)
Range
Measurement
Range
Accuracy
(23±3°C, 35 to 85%RH)
Input
Impedance
Maximum
Allowable
Input
1V
1 to 5V
(±5V)
±(0.04% of FS + 5digit)
Approx. 1MΩ
±250V
2A
4 to 20mA
(±20mA)
Approx. 10Ω
±50mA
11
±199.999mV
±(0.03% of FS + 5digit)
10Ω or more
±50V
* The accuracy and resolution for Ranges 1V and 2A are the specifications at
±5V and ±20mA respectively.
Sensor power (Isolated input): DC12V±10% 50mA, or DC24V±10% 25mA,
or DC10V±10% 60mA
* Sensor source voltage switched using sockets.
･Display Specifications
Main display section: Red / green 7 segment LED, height approx. 20mm
Display range: -199999 to 199999
･Comparison Section Specifications
Comparison results: HH, HI, GO, LO, LL (5 points)
Setting conditions: HH judgment value > HI judgment value > LO judgment
value > LL judgment value
Comparative output type: Normal output, Zone output
Pattern Selection: Switching between 8 comparative setting value patterns
possible using key panel or control terminals
Hysteresis: 4 point independent
Relay output: Contact capacity 1a contact, AC 250V/DC30V 1A (resistance
load), Electrical life 50,000 times (rated load)
Minimum application load (as reference): 10mA (DC 5V)
Photocoupler output: Output rating DC 30V 20mA (MAX), output saturation
voltage Max. 1.2V
･General Specifications
Operating temperature/humidity ranges: 0 to 50°C, 35 to 85% RH
(non-condensing)
Storage temperature/humidity ranges: -10 to 70°C, 60% RH or less
(non-condensing)
Power: AC 100 to 240V±10%, DC 12 to 48V±10%
Power consumption: Approx. 12VA max. (AC power), 6W max. (DC power)
External dimensions: 96mm (W) × 48mm (H) × 97.5mm (D) (without optional
unit installed)
Weight: Approx. 200 to 300g
Insulation withstands Voltage:
AC 500V per minute between input terminal and each of the output, control
terminal and sensor power source
AC 1500V per minute between power terminal and each of the input, output,
control terminal and sensor power source (AC Power Supply)
AC 500V per minute between power terminal and each of the input, output,
control terminal and sensor power source (DC Power Supply)
Insulation Resistance: Min. 100MΩ between the abovementioned terminals
when DC 500V is applied
Memory Backup: E2PROM, Writing frequency: 10,000 times
Accompanying Items: Instruction manual
･Option Specifications
･External Control (Isolated input)
Number of terminals: 7 inputs
Functions: Start/Hold, Peak Hold, Digital Zero, Relay Reset,
Pattern Selection 0, 1, 2
Input: No-voltage contact, NPN Open Collector Input
･BCD Output + External Control
BCD Output (Isolated input)
Output format: BCD code
NPN open collector input: DC 30V 10mA (MAX),
Output saturated voltage Max. 1.2V
TTL output: Positive logic TTL level (CMOS compatible), Fan-out 2
Output: BCD signal, print command (PC), pole (POL), over range (OVER)
Control Input: ENABLE
･External Control (Isolated input)
Number of Terminals: 7 inputs
Functions: Start/Hold, Peak Hold, Digital Zero, Relay Reset,
Pattern Selection 0, 1, 2
Input: No-voltage contact, NPN open collector input
･Analog Output + External Control
Analog Output (Isolated input)
Output Type
Load
Resistance
Accuracy
(23±5°C, 35 to 85%RH)
Ripple
0 to 10V
10kΩ or more
±0.1% of FS
50mVp-p
0 to 1V
1 to 5V
4 to 20mA
550Ω or less
25mVp-p
(at resistance of
250Ω)
Conversion System: D/A Conversion System
Resolution: 15 bit equivalent
Response Time: Approx. 80msec (10 →90%, sampling rate 50 times/min,
no moving average)
･External Control (input and isolation)
Number of terminals: 6 inputs
Functions: Start/Hold, Peak Hold, Digital Zero, Relay Reset,
Pattern Selection 0, 1
Input: No-voltage contact, NPN open collector input
Range
Measurement
Range
Accuracy
(23±3°C, 35 to 85%RH)
Input
Impedance
Maximum
Allowable
Input
11
±199.999mV
±(0.03% of rdg + 15digit)
10 MΩ or less
±50V
12
±1999.99mV
±(0.02% of rdg + 10digit)
13
±19.9999V
±(0.03% of rdg + 10digit)
Approx. 1MΩ
±250V
14
±199.999V

Instruction Manual MODEL AM-756 19/20
9 Trouble Shooting
9-1 Error Messages
Error Message
Possible Cause
Solution
Value exceeding the input range
Please adjust the input value so it is within the display range.
Value exceeding the display range
Please input a measurement value that is less than ±199999.
Start/Hold function is in HOLD mode.
Please set the Start/Hold function to start mode.
Please set the start delay function to 0.
Peak hold is Type B and the peak hold value has not
been updated.
Please update the peak hold value.
Please switch the peak hold type to A.
Both Start/Hold type and peak hold type are Type B.
Please switch either the Start/Hold type or peak hold type toA.
The set value has not been properly written due to the
power being cut while the setting value was being
written or similar reason.
In order to restore to previous status, it is necessary to initialize the set values.
This can be achieved by re-starting the system.
During initialization, will appear on the display, and when
initialization is complete, the screen will revert to the normal display. As the set
values will be initialized, please change the set values again.
* If the message appears even after executing initialization several
times, the cause could be that the possible numbers of saves to the E2PROM has
been exceeded and settings may no longer be able to be saved.
In this case, please consult your dealer or Watanabe Electric Industry directly.
The input unit has not been properly inserted in the
main unit.
Please firmly connect the input unit connector (male) to the main unit connector
(female).
9-2 Trouble Shooting
Problem
Possible Cause
Solution
The monitor display is blank.
The display blank function is set to extinguish
display.
Turn OFF the extinguish display function.
The set values cannot be changed.
The set value changes protect function is ON.
Turn OFF the set value change protect function.
The set values can be changed but the changed
values cannot be saved.
The changed set values exceed the set range.
Please change the set values so they fall within the set
range and save them.
The set values are not displayed.
The settings protect function is ON.
Turn OFF the settings protect function.
Voltage is not output to the sensor power terminal.
Current exceeding the allowable current output is
flowing to the sensor power terminal and the
output protection circuits have been activated.
Please change the sensor power terminal load so it is
less than the allowable current output and re-start the
device.
The external control terminal does not operate.
The control method during the digital zero, and
pattern selection functions is set to "INT".
Please change the control method to "EXT".
Linearize does not operate correctly.
The linearization set value does not fulfill the
setting conditions.
Please set the linearization set value so that it fulfills the
condition NXX > N(XX –1)
XX: 01 to 16
10 Timing Chart
10-1 Start/Hold A Type
Sampling
20msec × AVG set value (AVG: 1 = 20msec)
Start / Hold terminal ON
OFF
Start
Comparative output
terminal
ON
OFF
Minimum pulse width: Min. 5msec + (20msec × AVG set value)
Max. 10msec + (20msec × AVG set value)
During relay output: Approx. 3 to 7 msec
During photocoupler output: Max. 1 msec (Min. load 5mA)
Hold
Measurement
Measurement
Start
BCD print command
signal (PC)
ON
OFF
Measurement
Measurement
Measurement

Instruction Manual MODEL AM-756 20/20
10-2 Start/Hold B Type
Sampling
Start/Hold terminal ON
OFF
ON
OFF
Minimum pulse width: 5msec + (20msec × AVG set value) or more
Max. 10msec + (20msec × AVG set value)
Measurement
Measurement Measurement
Start Start
* 1 measurement with each “ON”edge
20msec × AVG set value (AVG: 1 = 20msec)
ON
OFF
Comparative output
terminal
BCD print command
signal (PC)
During relay output: Approx. 3 to 7 msec
During photocoupler output: Max. 1 msec (Min. load 5mA)
11 Warranty and After-sales Service
11-1 Warranty
The warranty period for this product is one year from the date of delivery. If any malfunctions occur during this period that is clearly judged to be caused by a
defect attributable to Watanabe Electric Industry Co, Ltd, Watanabe Electric Industry Co., Ltd will make repairs free of charge.
11-2 After-sales Service
This product was manufactured, tested, inspected and shipped under strict quality control measures. Should the product break down, please return the product to
the dealer or directly to Watanabe Electric Industry Co., Ltd. It would be appreciated if you would give a detailed account of the defect and enclose it with the
product.
* All specifications, designs and other contents contained in this instruction manual may, due to improvements, be subject to change without notice.
WATANABE ELECTRIC INDUSTRY CO., LTD.
6-16-19, Jingumae, Shibuya-ku, Tokyo 150-0001, Japan
Phone: [phone]
Homepage http://en.watanabe-electric.co.jp/
ASAHI KEIKI DIVISION
WATANABE ELECTRIC INDUSTRY CO., LTD.
6-16-19, Jingumae, Shibuya-ku, Tokyo 150-0001, Japan
Phone: [phone]
Homepage http://www.watanabe-electric.co.jp/en/