Georg Fischer Signet LLC, 3401 Aero Jet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
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3-2750.090 Rev. N 10/16 English
© Georg Fischer Signet LLC 2016
DryLoc pH/ORP Sensor Electronics
Mfr. Part No.
Code
Description
3-2750-1
159 000 744
In-line Sensor Electronics with Junction Box
3-2750-2
159 000 745
In-line Sensor Electronics with Junction Box and EasyCal
3-2750-3
159 000 746
Submersible Sensor Electronics with 4.6 m (15 ft) cable,
¾
in. NPT threads
3-2750-4
159 000 842
Submersible Sensor Electronics with 4.6 m (15 ft) cable, ISO 7-1/R
¾
threads
3-2750-7
159 001 671
In-line Sensor Electronics, Digital (S
3
L), with 4.6 m (15 ft) cable,
¾
in. NPT threads
3-2750-8
In-line Sensor Electronics, with 4.6 m (15 ft) cable, ISO 7-1/R
¾
threads
(Special Order Only)
Ordering Information
Parts and Accessories
3-0700.390
198 864 403
pH Buffer Kit
3-2700.395
159 001 605
Calibration kit: included 3 PP cups, cup stand, 1 pint pH 4.01, 1 pint pH 7.00
3-2759
159 000 762
pH/ORP Simulator/System tester
3-2759.391
159 000 764
Adapter cable to connect 2759 and 2750
3-8050-1
159 000 753
Universal Mount Junction Box
3-8050-2
159 000 754
Universal Mount Junction Box with EasyCal
3-8052-1
159 000 755
¾
in. NPT mount Junction Box
3-8052-2
159 000 756
¾
in. NPT mount Junction Box with EasyCal
3-9900.392-1
159 000 839
Liquid tight connector kit, NPT (1 connector)
3-9900.392-2
159 000 840
Liquid tight connector kit, PG 13.5 (1 connector)
3822-7004
159 001 581
pH 4.01 buffer solution, 1 pint (473 ml) bottle
3822-7007
159 001 582
pH 7.00 buffer solution, 1 pint (473 ml) bottle
3822-7010
159 001 583
pH 10.00 buffer solution, 1 pint (473 ml) bottle
3822-7115
159 001 606
20 gram bottle Quinhydrone for ORP calibration
5523-0322
159 000 761
Cable, 3-con shield (blk/red/wht/shld) 22 AWG (per ft)
P31515-0P200
159 000 630
Universal Pipe Adapter PVC
P31515-0C200
159 000 631
Universal Pipe Adapter CPVC
P31515-0V200
159 000 459
Universal Pipe Adapter PVDF
3-8050.390-1
159 001 702
Retaining Nut Replacement Kit, NPT, Valox
®
3-8050.390-3
159 310 116
Retaining Nut Replacement Kit, NPT, PP
LED and Output Condition
Possible Causes
Suggested Solutions
Current Output:
LED off,
current output is 3.6 mA
Digital (S
3
L):
Transmitter (8900 or
9900) displays "Check Sensor"
• No electrode installed.
• Bad/dirty contacts between
electrode and 2750.
• Install electrode.
• Check interconnection between electrode and 2750,
clean contacts, and/or lubricate sensor o-ring.
During EasyCal, the LED blinks
rapidly for 4 seconds and the
current output is frozen at a
random fi xed value.
• Buffer solution is outside of the
accepted tolerance for the 2750.
• The electrode is depleted
(> 1.1 pH or 65 mV offset).
• pH system: Use fresh 4 pH, 7 pH, or 10 pH buffer and
restart the calibration.
• ORP system: Use fresh 4 pH and 7 pH buffer solution
saturated with Quinhydrone, or Light's Solution.
• Clean or replace the electrode.
After completing calibration
procedure, the output values
are inaccurate.
• Insuf
fi
cient time allowed for
electrode stabilization during
calibration.
Recalibrate:
• Verify that test solutions are at room temperature
• Wait at least 30 seconds after placing electrode in
solution before pressing S1 EasyCal button.
Troubleshooting
