GF Signet 5700 User manual

English
Signet 5700 pH/ORP Monitor - ORP Instructions
V +
Red Wire
V -
Black wire
T -
White wire
T +
Green wire
mV Input
Brown wire
Iso. Gnd
Blue wire
-
+
pH/ORP
Blue
Black
Red
Brown
White
Green
Twist-Lock
Electrodes
Preamp:
Signet 2720
4-20
mA
Silver (earth ground)
5700
Terminals
DryLoc
Electrodes
Preamp:
Signet 2760-1
Signet 2760-2
CAUTION!
• Refer to instruction manual for more details.
• Remove power to unit before wiring input and output
connections.
• Follow instructions carefully to avoid personal injury.
1. Power Connections 2. Compatible Electrode/Preamp Wiring
= Double Insulate
d
= DC or AC power
Technical Notes:
• To reduce the possibility of noise interference, isolate AC power lines from signal lines.
• Maximum 4-20 mA loop impedance (sec. 3) is affected by the supply voltage.
• Use six conductor shielded cable for cable extensions up to 120 m (400 ft) max. (#5523-0064)
• Cable shield must be maintained through cable splice.
-
+
12-24 V
10 W
-
+
12 - 24 VDC
OR
12 - 24 VAC
5700
Terminals
External power
supply
CAUTION!
Never connect 110 VAC or 220 VAC to
rear power terminals. High voltage AC
will damage instrument and void warranty.
Contents
1. Power Connections
2. Compatible Electrode/Preamp Wiring
3. 4 - 20 mA Current Output Connections
4. Relay Connections
5. Relay Operation
6. Menu Functions
7. Parts and Accessories
8. Specifications
9. Quick Reference Menu Parameters
10. Troubleshooting
11. Maintenance
Total
reset
AUX
output
PLS
output
12
Gnd
+
+
-
+
Gnd
Freq. IN
Sen. Pwr.
Freq. IN
Iso. Gnd
Std. Sensor
Patent No. D376,328
Flow
Open Collector
Sensor
12-24 V
10 W
LISTED
77CJ
U
L
1 2 3 4 5 6 1 2 3 4
1 2
1 2
Tot al
reset
AUX
output
PLS
output
12
Gnd
+
+
-
+
Gnd
Freq. IN
Sen. Pwr.
Freq. IN
Iso. Gnd
Std. Sensor
Patent No. D376,328
Flow
Open Collector
Sensor
12-24 V
10 W
LISTED
77CJ
U
L
1 2 3 4 5 6 1 2 3 4
1 2
1. 2. 3.
Remove terminal blocks for easy wiring
*3-5700.090-1*
3-5700.090-1 Rev. K 3/06 English/ORP

2 Signet 5700 pH/ORP Monitor - ORP Instructions
ORP
ORP
Low setpoint=
Adjustable hysteresis=
Relay energized=
Relay de-energized=
High setpoint=
Adjustable hysteresis=
Relay energized=
Relay de-energized=
-1000
mV
+1000
mV
Relay 1 or
Relay 2
-500 mV +500 mV
0 pulses
ORP
300 pulses
-1000
mV
+1000
mV
Relay 1 or
Relay 2
+500 mV
-500 mV
ORP
300 pulses
0 pulses
Relay 1 Rate:
300 Pulses/min >
3
A. LOW alarm mode
The relay is energized when the ORP drops
below the setpoint, and is de-energized when
the ORP rises above the setpoint plus
hysteresis (sec. 6.3D, 6.3E).
B. HIGH alarm mode
The relay is energized when the ORP rises
above the setpoint and is de-engergized
when the ORP falls below the setpoint plus
hysteresis (sec. 6.3D, 6.3E).
Example 2 (right):
As the process ORP falls below the minimum pulse setpoint (+500 mV) the relay
begins pulsing; triggering the metering pump for chemical addition. As the ORP
continues to decrease, pulsing accelerates proportionally until the maximum
programmed pulse rate of 300 pulses/minute and setpoint (-500 mV) are
reached, forcing the process ORP back up to intended levels (e.g. ≥ +500 mV).
C. Proportional PULSE mode
The proportional pulse relay configuration is primarily designed for metering pump control. The
operator is prompted to enter a minimum and maximum ORP setpoint and maximum pulse rate for
the assigned relay (sec. 6.3F, 6.3G). Relay pulse width is fixed at 130 ms. Refer to the operation
examples below.
• Metering pump chemical addition (dry contact activation type required)
Example 1 (right):
As the process ORP rises above the minimum pulse setpoint (-500 mV) the relay
begins pulsing; triggering the metering pump for chemical addition. As the ORP
continues to rise, pulsing accelerates proportionally until the maximum programmed
pulse rate of 300 pulses/minute and setpoint (+500 mV) are reached, forcing the
process ORP back down to intended levels (e.g. ≤ -500 mV).
5. Relay Operation
4. Relay Connections
Two internal relay contact sets (COM, NO, and NC) may be used
for external device control. Front panel LED annunciators indicate
the activation status of each relay. Each relay can control up to
two devices simultaneously, as shown. Relay operation modes
include Low alarm, High alarm, and Proportional Pulse (sec. 5).
Common device connections include:
• Pulse mode - metering pump control
• Pulse mode - solenoid valve control
• Low or High mode - warning lamps
• Low or High mode - bells or sirens
• Low or High mode - external heavy-duty relay
Wiring Example Right
Device A IS powered when relay 2 is de-energized (front panel
LED “off”). Power is discontinued when the relay 2 setpoint is
reached (front panel LED “on”). Device B IS NOT powered when
the relay 2 is de-energized. Power is applied after the relay 2
setpoint is reached.
+
-
-
Device
A
External AC/DC
power
+
-
+
Device
B
Relay 1Relay 2
NC
C
NO NC
C
NO
5700
Terminals
NC
C
NO NC
C
NO
Relay
De-energized
Relay
Energized
Technical Notes:
• Maximum relay contact ratings: 5 A @ 30 VDC, 5 A @ 125
VAC, or 3 A @ 250 VAC
• An external heavy-duty relay must be used for devices with
surge currents or operating currents that exceed the above
specifications.
3. 4 - 20 mA Current Output Connections
Technical Notes:
**1/8A fuse recommended (customer supplied)
* 4-20 mA output is internally powered (non-isolated), maximum
loop impedance 350 Ω with a 12 V instrument supply voltage,
950 Ω with a 24 V instrument supply voltage.
To isolate output and prevent ground loop problems:
1. Use monitor device with isolated inputs, or
2. Use separate DC supply for 5700 and monitor device, or
3. Power 5700 with12 - 24 VAC step down transformer
-
+
pH/ORP
4-20
mA
-
+
Fuse**
1/8A
4 - 20 mA
*
5700
Terminals

3
Signet 5700 pH/ORP Monitor - ORP Instructions
6. Menu Functions
To access either CALIBRATE or OPTIONS menus, press and hold
the ENTER key as illustrated below:
Menus:
• VIEW menu (sec. 6.1): The VIEW menu is displayed during
standard operation. The operator can navigate freely through
the menu by pressing either UP or DOWN arrow keys.
• CALIBRATE Menu (sec. 6.3): The CALIBRATE menu contains
all critical display setup and output parameters. A simple secu-
rity code feature prevents unauthorized tampering. The operator
is required to enter a simple access code for menu access. The
same code also unlocks OPTIONS menus.
• OPTIONS Menu (sec. 6.4): The OPTIONS menu contains
setup and display features that are seldom accessed for minor
display or output adjust-
ments.
• Reversible Dial
Your 5700 includes a
reversible dial face for
pH use. See enclosed
pH manual for opera-
tion details.
OPTIONS
(sec. 6.4)
CALIBRATE
(sec. 6.3)
VIEW
(sec. 6.1) 2
seconds 5 seconds
Press & hold ENTER key
for access:
ENTER
6.1 VIEW Menu
Choose:
1
Change:
2
Save:
3
Buffer calibration
Loop output
Press and release to access
EASY CAL Procedure
Last calibration
Range
Relay 1
Relay 2
ORP mV/Raw mV
A.
B.
C.
D.
E.
F.
G.
↓G
↑A
Menu Displays A - G:
(Factory default displays shown in
menu column 1)
A. Shows calibrated solution ORP
mV and Raw (uncalibrated) input
mV from ORP electrode/preampli-
fi e r
B. Loop output display: shows the
loop current output level.
C. ORP range display: shows the
programmed min and max meter
range (sec. 6.3A)
D. Relay 1 display: this display
shows the programmed opera-
tion mode and setpoint for relay 1
(sec.
6.3D-E)
E. Relay 2 display: this display
shows the programmed opera-
tion mode and setpoint for relay 2
(sec.
6.3D-E)
F. Last calibration: this display
shows a user defined setup date
for
maintenance records. This
feature is not an internal timer or
calender.
G. EASY CAL: press the right arrow
key to access the EASY CAL
buffer calibration procedure (sec.
6.2).
See EASY CAL Procedure (Section 6.2)
BA
D
C
ENTER
ALARM 1 ALARM 2
-
1000
ALARM 1 ALARM 2
0
pH
14
+1000
0 - 14 pH
ORP

4 Signet 5700 pH/ORP Monitor - ORP Instructions
quick
press
Place electrode tip in
first pH buffer saturated
with Quinhydrone;
pH 7.0 ≈ 87 mV
pH 4.0 ≈ 264 mV
Allow for stabilization Press
first buffer calibration.
to accept
To exit EASY CAL at any time
without saving changes:
ENTER
Place electrode tip in
second (different) pH
buffer saturated with
Quinhydrone;
pH 4.0 ≈ 264 mV
pH 7.0 ≈ 87 mV
Allow for stabilization Press
second buffer calibration.
ENTER to accept
Display returns to VIEW
Menu in 3s
Press keys in sequence
will appear during code entry.
to continue,
To Calibrate:
1
Response:
2
To Accept:
3
30 seconds*
30 seconds*
1
2
Displayed Data
• ORP mV: Shows the calibrated
solution oxidation reduction
potentioal (ORP).
• Input mV: Shows the actual
Raw (uncalibrated) preamplifier
ORP electrode input
Technical Note:
The differences between input mV and ORP mV is a good indication of the electrode's condition.
Differences in excess of 50 mV may indicate a need to service the electrode. Refer to electrode
manual for maintenance recommendations.
6.2 EASY CAL Procedure
Requirements
• This procedure simplifies system calibration using standard pH 4.0 and 7.0 buffers saturated with
Quinhydrone (customer supplied). If standard pH 4.0 and 7.0 buffers and Quinhydrone are not
available, the system can be calibrated using the CALIBRATE menu standard and slope settings
(sec. 6.3B, 6.3C).
• Quinhydrone (customer supplied) is the oxidizer measured by the ORP electrode and is essen-
tial for EASY CAL calibration. To guarantee saturation with pH 4.0 and 7.0 buffers, mix 1/8 g (1/4
mL) of Quinhydrone powder for each 50 mL of pH buffer solution (sec. 7).
For best results, gently stir the
submerged electrode for
approximately 5 seconds during
the stabilization period (step 2).
Theoretical mV values
pH @ 25 °C mV
2 +296
3 +237
4 +177
5 +118
6 +59
7 0
8 - 59
9 - 118
10 - 177
11 - 237
12 - 296

5
Signet 5700 pH/ORP Monitor - ORP Instructions
6.3 CALIBRATE Menu
Requirements
System calibration is possible with two known ORP solutions within -1000 mV - +2000 mV. The
EASY CAL procedure (sec. 6.2) is recommended when standard pH buffers and Quinhydrone are
available. If EASY CAL is performed, manual calibration steps B-C below are not required and
should be skipped.
Choose:
1
Change:
2
Save:
3
Allow for stabilization
Last calibration
quick
press
To return to
VIEW:
quick
press
To restore original value:
Electrode standard
Optional
Allow for stabilization
Electrode slope
Range Meter min→max
Press keys in sequence
will appear during code entry.
to continue,
Mode Setpoint
Relay
Hysteresis
Relay
Pulse rate
Relay
Mode Range
Relay
↓H
↑A
Relay Low or High Mode Selected
Relay Pulse Mode Selected, step D
ENTER
"SAVING"
briefly
displays
A.
B.
C.
D.
E.
F.
G.
H.
Menu Settings A - H:
(Factory default displays shown in
menu column 1)
A. Sets Min → Max meter dial
range, -1000 mV - +2000 mV
(factory installed dial, -1000 mV -
+1000 mV). Contact factory for
custom dial configurations. Does
not effect 4 to 20 mA output
B. Sets electrode standard to any
value from -1000 mV to +2000
mV (standard value must be
≥120 mV from slope value,
step C)
C. Sets electrode slope to any value
from -1000 mV to +2000 mV
(slope value must be ≥120 mV
from standard value, step B)
Menu items D-G repeat for relay 2
setup.
D. Sets relay operation mode Low
or High, and ORP (mV) setpoint,
-1000 mV - +2000 mV
(sec. 5A-B)
E. Sets relay hysteresis, 00000 -
02000 mV. Set to zero to disable
feature (sec. 5A-B)
F. Sets relay minimum and maxi-
mum pulse setpoint, -1000 mV
- +2000 mV (sec. 5C)
G. Sets relay pulse rate, 000 - 300
pulses/minute.
H. Sets user defined setup date
for maintenance records. This
feature is not an internal timer or
calender
Quick Reference Calibration Procedures:
2-Point Quick Calibration (recommended):
1. Set solution standard (step B)
2. Set solution slope (step C)
1-Point Calibration (optional):
1. Set solution standard (step B)

6 Signet 5700 pH/ORP Monitor - ORP Instructions
6.4 OPTIONS Menu
Choose:
1
Change:
2
Save:
3
quick
press
To return to
VIEW: quick
press
To restore original value:
Contrast Low -- -- -- -- -- High
Loop output 20 mA adjust
Press keys in sequence
will appear during code entry.
to continue,
Loop output 4 mA adjust
Loop output 4 mA setpoint
Loop output 20 mA setpoint
ENTER
"SAVING"
briefly
displays
A.
B.
C.
D.
E.
↓E
↑A
Menu Settings A - E:
(Factory default displays shown in
menu column 1)
A. Selects display contrast: 5 levels
B. Sets 4 mA setpoint: -1000 -
+2000 mV. 4 mA and 20 mA
setpoints are reversible
C. Sets 20 mA setpoint: -1000 -
+2000 mV. 20 mA and 4 mA
setpoints are reversible
D. Adjusts 4 mA output: 3.0 to 5.0
mA (overrides factory 4.00 mA
calibration)
E. Adjusts 20 mA output: 19 to 21
mA (overrides factory 20.00 mA
calibration)
7. Parts and Accessories
• Power supply, 120 VAC - 24 VAC, #3-5000.075
• pH buffer kit, pH 4.0, 7.0, 10.0, #3-0700.390 (code 198 864 403)
• Front snap-on bezel, #3-5000.525 (code 198 840 226)
• 5700 pH/ORP instruction sheet, #3-5700.090-1 (code 198 869 915)
Optional surface
mount bracket #3-
5000.598
(code 198 840 225)
5 x 5 inch adapter plate for
Signet retrofit
#3-5000.399
(code 198 840 224)
Splashproof rear cover
#3-5000.395
(code 198 840 227)

7
Signet 5700 pH/ORP Monitor - ORP Instructions
Side View
Mounting Clamp (2 ea.)
Optional Splashproof Rear Cover
#3-5000.395
88 mm
(3.5 in.)
Mounting Panel
Panel
Gasket
91 mm
(3.6 in.)
76 mm (3 in.)
88 mm (3.5 in.)
96 mm (3.8 in.)
96 mm
(3.8 in.
)
Front View
96 mm (3.8 in.)
ENTER
RELAY 1 RELAY 2
ORP
-1000
-750 +750
-500 +500
-250 +250
0
+1000
Signet Monitor
8. Specifications
General
Compatible sensors: Signet 3-2720 pH/ORP Preamplifier/
Sensor System
Accuracy: ±0.2% of full scale
Input range:
• ORP: -1000 to +2000 mV, optically isolated
(standard -1000 to +1000 mV dial included)
Enclosure:
• Rating: NEMA 4X/IP65 front
• Dimensions: 1/4 DIN, 96 x 96 x 88 mm (3.8 x 3.8 x 3.5 in.)
• Case: ABS plastic
• Keypad: Sealed 4-key silicone rubber
• Weight: Approximately 500 g (18 oz.)
Display:
• Type: Microprocessor controlled air-core meter movement and
backlit Alpha-numeric 2 x 16 LCD
• Update rate: <1s
• Contrast: User selected
• Relay annunciators: 2 LEDs
Environmental
Operating temp.: -10 to 55 °C (14 to 131 °F), 50 °C (122 °F) with
optional rear cover
Storage temp.: -15 to 80 °C (5 to 176 °F)
Relative humidity:0 to 95%, non-condensing
Altitude: 4000 m max.
Pollution degree: 2
Dimensions
Electrical
Power requirements:
• 12 to 24 VDC or 12 to 24 VAC, unregulated, 50-60 Hz,
10 W max.
Relay contacts (2 sets):
• Mechanical SPDT contacts
• Max. voltage rating: 5 A @ 30 VDC, 5 A @ 125 VAC, or
3 A @ 250 VAC, (power factor = 1.0)
• Hysteresis: User adjustable
Current output:
• 4 to 20 mA, non-isolated, internally powered, fully adjustable and
reversible
• Update rate: <1s
• Max loop impedance: 350 Ω with a 12 V instrument supply
voltage, 950 Ω with a 24 V instrument supply voltage
• Accuracy: ±0.1% of max. range
Noise immunity: EN50082-2
Noise emissions: EN55011
Safety: EN61010-1
Agency Approvals
• CE, UL listed
• Manufactured under ISO 9001
(continued)

8 Signet 5700 pH/ORP Monitor - ORP Instructions
92 x 92 mm
(3.62 x 3.62 in.)
Panel cutout
88 mm
(3.5 in.)
88 mm (3.5 in.)
Rear View
12-24 V
10 W
NC
C
NO NC
C
NO
-
+
V +
Red Wire
V -
Black wire
-
+
T -
White wire
T +
Green wire
Iso. Gnd
Blue wire
mV Input
Brown wire
4-20
mA
Relay 1Relay 2
Patent No. D 376,328
pH/ORP
Signet
Model #3-5700
LISTED
77CJ
UL
®
Dimensions
9. Quick Reference Menu Parameters
9.1 VIEW Menu Setup Parameters (sec. 6.1)
Menu
Parameters
Factory
Default
Range
Display
Description
• ORP mV
• Raw sensor mV
Current loop
output
Min → Max meter
and dial range
• Relay 1 mode
• Relay 1 setpoint
• Relay 2 mode
• Relay 2 setpoint
Last calibration
date
EASY CAL
procedure
• -1000 mV - +2000 mV
• -1000 mV - +2000 mV
3 - 21 mA
-1000 mV -
+2000 mV
Low, High, or Pulse,
-1000 - +2000 mV
Low, High, or Pulse,
-1000 - +2000 mV
00 - 00 - 00 -
39 - 39 - 99
Two pH buffers saturated
with Quinhydrone required:
pH 4= +87 mV,
pH 7= +264 mV,
(sec. 6.2)
n/a
n/a
n/a
-1000 mV -
+1000 mV
Low
-500 mV
High
+500 mV
01 - 01 - 98
n/a
A.
B.
C.
D.
E.
F.
G.

9
Signet 5700 pH/ORP Monitor - ORP Instructions
9.2 CALIBRATE Menu Setup Parameters (sec. 6.3)
Menu
Parameters
Factory
Default
Range
Display
Description
Min → max
meter/dial range
Manual electrode standard
calibration
Manual electrode slope
calibration
• Relay 1 mode
• Relay 1 setpoint
Relay 1 hysteresis
• Relay 1 mode
• Relay 1 range
Relay 1
pulse rate
Last calibration
date
-1000 -
+2000 mV
-1000 -
+2000 mV
-1000 -
+2000 mV
Low or High
-1000 - +2000 mV
00000 - 02000 mV
Pulse
-1000 - +2000 mV
000 - 300
pulses/minute
00 - 00 - 00 -
39 - 39 - 99
-1000 -
+1000 mV
n/a
n/a
Low
-500 mV
10 mV
-500 - +500 mV
120
pulses/minute
01 - 01 - 98
A.
B.
C.
D.
E.
F.
G.
H.
9.3 OPTIONS Menu Setup Parameters (sec. 6.4)
Menu
Parameters
Factory
Default
Range
Display
Description
Display contrast
4 mA setpoint
20 mA setpoint
4 mA adjust
20 mA adjust
0 to 5
-1000 -
+2000 mV
-1000 -
+2000 mV
3.0 to 5.0 mA
19 to 21 mA
3
-1000 mV
+1000 mV
4.00 mA
20.00 mA
A.
B.
C.
D.
E.
Relay mode and
setpoint displays
repeat for relay 2
setup

10 Signet 5700 pH/ORP Monitor - ORP Instructions
10. Troubleshooting
(continued)
Display Problem Solution
1. 7.04 pH
+25.0°C
(Example↑)
pH electrode installed
in preamplifier
Remove pH electrode and replace with recommended ORP
electrode (sec. 2).
2. CHECK
SENSOR ?
Electrode not installed in
preamplifier
mV input from preampli-
fi e r
out of range
(≤ -1000 mV)
Missing or wrong
electrode identification
resistance applied to rear
T+ and T- terminals.
1) Verify preamplifier/electrode input connections and electrode
installation (sec. 2).
2) Disconnect Green and White preamplifier wires from rear T+ and
T- terminals. Measure ORP electrode identification resistance across
disconnected wires for 9.0 kΩ - 10.8 kΩ. If measured resistance
is out of range:
• Wrong electrode installed in preamplifier (pH electrode = 3 kΩ @
25°C (77 °F))
• Faulty preamplifier contacts, see preamplifier manual for additional
information
• Faulty electrode, see electrode manual for additonal information
3) To verify instrument:
• Disconnect Green and White preamplifier wires from rear T+
and T- terminals, then install a 10 kΩ fixed resistor across the
terminals.
• Disconnect Brown and Blue preamplifier wires from rear mV Input
and Iso. Gnd terminals. Install shorting strap (jumper) across mV Input
and Iso. Gnd terminals.
• Power instrument and verify 0 mV on the “Input mV” display
(sec. 6.3B). If 0 mV ±5 mV are not displayed, the instrument requires
factory calibration. If “Input mV” are within ±5 mV, calibrate instrument
“Set Standard” for 0 mV (sec. 6.3B).
• If instrument displays correctly after calibration, instrument is ok;
preamplifier and/or electrode problem exists. Refer to preamplifier and
electrode manual for troubleshooting information.
3. Out Of Range
Use Manual Cal
pH buffers other than pH
4 and 7 saturated with
Quinhydrone used during
EASY CAL procedure;
pH 4= +87 mV,
pH 7= +264 mV
Use pH 4 and 7 buffers (ONLY) saturated with Quinhydrone for
EASY CAL procedure (sec. 6.2). The EASY CAL procedure simplifies
manual Standard and Slope calibration in the CALIBRATE Menu
(sec. 6). The instrument can be calibrated using two buffers of
known ORP by this method (sec. 6.3B, 6.3C). If manual
calibration is performed, the EASY CAL procedure is not required.
4. ! Same Buffer Same pH buffer used for
EASY CAL solution #1
and solution #2
Use different buffer saturated with Quinhydrone for EASY CAL
procedure solution #1 and solution #2 (sec. 7). Do not calibrate
both points with the same buffer!
5. ORP: +2000 mV
Input: +2000 mV
(display stuck at
+2000 mV)
Excessive mV input from
preamplifier
Faulty preamplifier, refer to preamplifier manual for additional informa-
tion
To verify instrument input:
• Disconnect Brown and Blue preamplifier wires and install shorting
strap (jumper) across rear mV input and Iso Gnd terminals.
• Power instrument and verify 0 mV on display. If 0 mV is not
displayed, calibrate Standard input for 0 mV (sec. 6.3B)
• If instrument displays correctly after calibration, instrument is ok.
If error condition persists, instrument requires factory service.