GW Instek GDM-SC1 User manual
Scanner Card
GDM-SC1
INSTALLATION GUIDE
GW INSTEK PART NO. 82DM-SC100ED1
ISO-9001 CERTIFIED MANUFACTURER
December 2013
This manual contains proprietary information, which is protected by
copyrights. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of Good Will company.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves
the right to change specifications, equipment, and maintenance
procedures at any time without notice.
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City, 236, Taiwan.
GDM-SC1 Scanner Card
SCANNER CARD
The optional scanner, GDM-SC1, lets you effectively
measure multiple channels when connected to a
GDM-8255A, GDM-8261 or GDM-8261A multimeter.
Up to two GDM-SC1 scanner cards can be installed into
the GDM-8255A or one GDM-SC1 into the GDM-8261
or GDM-8261A. If two scanner cards are installed, one
can be selected as the master scanner (channel 1), and the
other as the slave (channel 2).
Installation
GDM-SC1 Basic Specifications.................................4
Configure scanner ....................................................4
Select Channel group and enable scanner................6
Connect wire ............................................................7
Insert scanner ........................................................10
Scanner Configuration Record................................12
Specifications
Specifications .........................................................13
GDM-SC1 Basic Specifications
GDM-SC1 Basic Specifications
2-wire channel
16 pairs
Maximum current
2A (ch17, ch18)
4-wire channel
8 pairs
Resistance
2/4 wire
Single wire channel
N/A
Cold junction
N/A (internal)
Maximum voltage
250V
Connection
Screw terminal
Scanner Installation
Configure scanner
Open Scanner
cover
1. Take off four screws from the bottom panel of the
scanner.
2. Remove the top panel.
GDM-SC1 Scanner Card
3. Note the connection terminals.
Overview
16 general purpose channels are available, 8 on the left
row, 8 on the right row. Current (ACI, DCI) measurement
uses 2 extra channels. All channels are fully isolated (Hi
and Lo).
Scan/Step
connection
Refer to the below table for measurement and test line
connection.
Note: Not all items can be used with the GDM-8255A.
Item
No. of wires
No. of channels
DCV, ACV
2 wires (H, L)
16 (CH1 ~ 16)
DCI, ACI
2 wires (H, L)
2 (CH17, 18)
(10A range only)
2W Resistance
2 wires (H, L)
16 (CH1 ~ 16)
4W Resistance
4 wires (Input H,
L + Sense H, L)
8 pairs (CH1
[input]& 9[sense],
2&10,....8&16)
Diode/Continuity
2 wires (H, L)
16 (CH1 ~ 16)
Period/Frequency
2 wires (H, L)
16 (CH1 ~ 16)
Temp.
(Thermocouple)
2 wires (H, L)
16 (CH1 ~ 16)
Scanner Installation
Temp. 2W RTD
2 wires (H, L)
16 (CH1 ~ 16)
Temp. 4W RTD
4 wires (Input H,
L + Sense H, L)
8 pairs (CH1
[input]& 9[sense],
2&10,....8&16)
Select Channel group and enable scanner
Background
When 2 scanner modules are installed in the
GDM-8255A, 2 groups of 18 channels each are available.
The scanner modules have a jumper to configure which
scanner is for which group. If only one scanner is
installed, the scanner should always be configured to
group 1(CH101~CH118).
The GDM-8255A can have up to 2 scanner modules
installed, whilst the GDM-8261/GDM-8261A can have
only 1 scanner module installed.
Group1
CH101 ~ 118
Group2
CH201 ~ 218
Select group
(Jumper J8)
Set the jumper J8 in the center of the board accordingly.
Move the jumper to the right (pins 2-3) for selecting
CH1xx (101 ~ 118), and move to the left (pins 1-2) for
selecting CH2xx (201 ~ 218). If two scanners are
installed, set one scanner to Master (CH1xx) and the
other to Slave. If only one scanner is installed, set the
jumper to Master.
1 2 3
J8
1
2
3
1
2
3
CH201-218
SLAVE
CH101-118
MASTER
J8
GDM-SC1 Scanner Card
Enable scanner
(Jumper J9)
Set the jumper J9 on the rear side of the board
accordingly. Move the jumper up (pins 3-2) to disable the
scanner, and down (pins 2-1) to enable the scanner.
3
2
1J9
3
2
1
3
2
1
Enabled
Disabled
J9
Connect wire
Wire selection
Make sure the wires have at least the same Voltage and
Current capacity as the maximum ratings in the
measurement.
Connection
1. Turn the screw left (loose) using the screw driver and
insert the wire. Turn the screw right (tight) and
secure the connection.
Tighten
Loosen Insert
Scanner Installation
2. Route the wires as follows, using the two openings
(left and right) at the front cover.
Note
When using thermocouple wiring, please use
extension wires so that the cold junction points are
external to the scanner card. Connecting
thermocouple wiring directly to the scanner box is
not recommended due to the radiant heat from the
internal components.
Best if longer
than 20cm Thermocouple
wire
Cold junction
points
Extension
wires Hot junction
point
3. Bundle the wires at the front cover using the holes at
the bottom.
Scanner Installation
Insert scanner
Power Off
Turn the Power Off and take out the power cord.
Open the rear
panel slot
Take out the two screws on the slot corners to remove the
optional slot cover. Keep the screws for later reuse.
GDM-8255A shown
GDM-SC1 Scanner Card
Insert the
scanner
Insert the scanner (already configured according to the
procedures on page4) to either the top or bottom slot
(GDM-8261/GDM-8261A only has 1 slot). Close the
cover by tightening the screws.
GDM-8255A shown
Power On
Connect the power cord and turn On the power.
CAUTION
Do not input voltages exceeding 250V to the front input
terminals whilst the scanner module is installed.
WARNING
Do not connect any leads to the front input terminals
while the scanner is active. Input signals scanned by the
scan module also appear on the front terminals.
Scanner Installation
Scanner Configuration Record
Channel
Wire color
Measure type
Note
CH1
H
L
CH2
H
L
CH3
H
L
CH4
H
L
CH5
H
L
CH6
H
L
CH7
H
L
CH8
H
L
CH9
H
L
CH10
H
L
CH11
H
L
CH12
H
L
CH13
H
L
CH14
H
L
CH15
H
L
CH16
H
L
CH17
H
L
CH18
H
L
CARD INPUT
H
L
CARD SENSE
H
L
AMPS
H
L
GDM-SC1 Scanner Card
Specifications
General
Note
All specifications are ensured only under a single display.
At least 30 minutes of warm-up time is required before
applying these specifications.
General
measurement
channels
16 channels of 2-pole relay input, which are configurable to
be 8 channels of 4-pole inputs
Dedicated current
measurement
channels
2 (Channel 17,18)
Maximum Signal
Level
Channels 1-16: 250V DC or rms, 1A switched, 30 W, 62.5VA
(resistive load)
Channels 17-18: 60V DC or 30V rms, 2A switched, 30 W,
62.5VA (resistive load)
Resistance
Measurement
2/4 Wire
Cold Junction
Compensation
Simulated
Contact
Resistance
<1Ωat the end of contact life
Contact Life
>105operations of rated load (resistive loads only)
>108operations of cold switching
Relay Actuation
Time
<6ms
Isolation between
any two channels
>1010Ω,<100pF
Input Differential
Isolation
>1010Ω,<75pF
Connection
Screw Terminal
Operation
Environment
Ambient Temperature 0°C~40°C, Relative Humidity<75%
(For full accuracy: 18°C ~28°C)
Temperature
Coefficient
<0.2 x applicable accuracy per degree (°C)
(for 0°C ~18°C and 28°C ~40°C)
Storage
Environment
Ambient Temperature -10°C ~70°C
Relative Humidity: 0°C ~35°C <75%, 35°C ~50°C <50%
Dimension
121(W) x 22(H) x 178(D) mm
Weight
260 grams
Specifications
GDM-8255A Reading rates (readings/sec)
Note
Test conditions: Auto mode off, auto range off, in simple
mode with default delays.
The test items listed below may require proper delay to
obtain in-spec reading.
Function
Rate(readings/sec)
S
M
F
DCV
5
7.5
11
DCI
5
7.5
11
ACV
0.3
0.4
0.4
ACI
0.3
0.4
0.4
2/4WΩ
(10M/100MΩ)
1.1
1.7
2.3
ACV+DCV
1.2
1.8
3.5
ACI+DCI
0.3
0.5
0.6
Diode
7.9
7.9
13
GDM-8261/GDM-8261A Reading rates (readings/sec)
Note
Test conditions: Auto Range Off, Auto Zero/Gain Off,
ADC Speed: Quick, Count: 10, All Delays are set to zero.
The test items listed below may still need proper delay to
obtain in-spec reading.
Function
Rate(readings/sec)
S
M
F
Comments
DCV
4.35
16.4
29
ACV
0.3125
0.53
0.7
AC BW=3~300kHz
DCI
2.5
5
10
ACI
0.32
0.53
0.625
AC BW=3~300kHz
2/4 WR
4.31
16.4
30.5
Diode/Cont
11.23
18.5
23.35
Frequency
0.45
2.04
4.31 (8261)
2.99 (8261A)
Gate Time=10ms
GDM-SC1 Scanner Card
GDM-8255A Reading rates-Frequency (readings/sec)
Note
The signal being measured must be:
≥0.1V rms when its frequency is lower than 100kHz
≥1V rms when its frequency is lower than 600kHz
≥2.5V rms when its frequency is lower than 800kHz
Bandwidth of frequency measurement: 10Hz ~ 800kHz
* Signal frequencies lower than 150Hz may need proper
delay to obtain in-spec reading.
Frequency
Rate(reading/sec)
Under 150Hz
1.1*
150Hz ~ 1.5kHz
1.8
1.5kHz ~ 15kHz
2.6
15kHz ~ 150kHz
4.5
Above 150kHz
12
GDM-8261 Reading rates-Frequency (seconds/reading)
Note
Test Conditions: Auto Range Off, Filter Off, Auto
Zero/Gain Off, Count: 10, All Delays are set to zero,
D-Shift: On
Bandwidth of Frequency Measurement: 3Hz~300kHz
Speed
Signal Level
Rate (Second/Reading)
Slow
100mV rms
2.62 Sec@3Hz
2.18 Sec@300kHz
Mid
100mV rms
552 mSec@20Hz
500 mS @300kHz
Fast
100mV rms
236 mSec@200Hz
200 mS @300kHz
GDM-8261A Reading rates-Frequency (seconds/reading)
Note
Test Conditions: Auto Range Off, Filter Off, Auto
Zero/Gain Off, Count: 10, All Delays are set to zero,
D-Shift: On
Bandwidth of Frequency Measurement: 3Hz~300kHz
Speed
Signal Level
Rate (Second/Reading)
Slow
100mV rms
2 Sec@3Hz
1.8 Sec@300kHz
Mid
100mV rms
552 mSec@20Hz
548 mS @300kHz
Fast
100mV rms
332 mSec@200Hz
332 mS @300kHz
Specifications
DC Voltage
Note
*: 250V is the maximum input voltage limitation of
GDM-SC1 Scanner card though it is in fact used in the
1000.00V range.
Maximum Input: 250V DC or Peak on all ranges
Rate
Range
Resolution
Full Scale
Accuracy
±(% of reading + digits)
Slow
100.000mV
1uV
199.999mV
0.015%+10
1.00000V
10uV
1.99999V
0.015%+7
10.0000V
100uV
19.9999V
0.015%+7
100.000V
1mV
199.999V
0.015%+7
250.00V*
10mV
250.00V*
0.015%+7
2W Resistance
Note
Maximum Input: 250V DC or 250Vrms AC
*: Ranges on which residual resistance needs to be
manually offset from readings when measuring.
Rate
Range
Full Scale
Accuracy
±(% of reading + digits)
Slow
100.000Ω
199.999Ω
0.125%+10*
1.00000kΩ
1.99999kΩ
0.1%+7*
10.0000kΩ
19.9999kΩ
0.075%+7*
100.000kΩ
199.999kΩ
0.075%+7
1.00000MΩ
1.99999MΩ
0.075%+7
10.0000MΩ
19.9999MΩ
0.375%+7
100.000MΩ
199.999MΩ
3.75%+10
4W Resistance
Note
Maximum Input: 250V DC or 250Vrms AC
*: Ranges on which residual resistance needs to be
manually offset from readings when measuring.
Rate
Range
Full Scale
Accuracy
±(% of reading + digits)
Slow
100.000Ω
199.999Ω
0.0625%+10*
1.00000kΩ
1.99999kΩ
0.0625%+7*
10.0000kΩ
19.9999kΩ
0.0625%+7*
100.000kΩ
199.999kΩ
0.0625%+7
1.00000MΩ
1.99999MΩ
0.0625%+7
10.0000MΩ
19.9999MΩ
0.375%+7
100.000MΩ
199.999MΩ
3.75%+10
GDM-SC1 Scanner Card
DC Current
Note
When GDM-SC1 scanner card is used, 1A & 10A ranges
are protected with a 3A fuse
Current ranges smaller than 1A are not selectable when
GDM-SC1 scanner card is used.
Rate
Range
Resolution
Full Scale
Accuracy
±(% of reading + digits)
Slow
1.0000A
100uA
1.9999A
0.25%+7
AC Voltage
Note
Maximum Input: AC 250V rms
The specifications are only applicable for sinusoidal
signals with amplitudes greater than 5% of the Full Scale
reading.
(*)Input <200V for 20~45Hz. 250V is the maximum
input voltage limitation of GDM-SC1 Scanner card even
though it is used in the 750.00V range.
Rate
Range
Resolution
Full Scale
Slow
100.000mV
1uV
199.999mV
1.00000V
10uV
1.99999V
10.0000V
100uV
19.9999V
100.000V
1mV
199.999V
250.00V(*)
10mV
250.00V
Rate
Range
Accuracy (reading%+digits)
Slow
20~45Hz
45~10kHz
10k~30kHz
30k~100kHz
100.000mV
1.25%+125
0.25%+125
1.875%+375
6.25%+375
1.00000V
1.25%+125
0.25%+125
1.25%+125
3.75%+250
10.0000V
1.25%+125
0.25%+125
1.25%+125
3.75%+250
100.000V
1.25%+125
0.25%+125
1.25%+125
3.75%+250
250.00V(*)
1.25%+125
0.25%+125
1.25%+125
3.75%+250
AC Current
Note
The following specifications are only applicable for
sinusoidal signals with amplitude greater than 5% of the
Full Scale reading
1A & 10A ranges protected with a 3A fuse
1A/10A range specifications are verified for < 5kHz
Rate
Range
Resolution
Full Scale
20~50Hz
50Hz~
10kHz
10kHz~
20kHz
S
1.0000A
100uA
1.9999A
--
1.25%+125
--
Specifications
AC Frequency
Note
Maximum Input: 250Vrms or 330V peak.
Rate
Sensitivity
10Hz~100kHz
100k~600kHz
600k~800kHz
Slow
2.5V
0.0625%+19
0.0625%+4
0.0625%+4
1V
0.0625%+19
0.0625%+4
--
0.1V
0.0625%+19
--
--
Diode/Continuity
Note
Max. Input: 250V DC or 250 V rms AC
Diode
Range
Approx. 2V, 0.5mA
Continuity
1 ~ 1000Ω
Temperature
Note
Sensor errors excluded from Temperature specifications
Thermocouple
Measurement Range
K
0 ~ +300°C
T
0 ~ +300°C
J
0 ~ +300°C
Resolution
0.01°C
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