User guide

ManualsBrandsGF Signet ManualsTools2759 pH-ORP System Tester

Features:

A) Power OFF Button

B) Output simulation buttons and indicators.

Simulate pH and ORP output at ﬁ ve ﬁ xed values:

pH 4, pH 7, pH 10, –700 mV and +700 mV.

Pressing one of these buttons turns the 2759 on.

C) Low battery indicator

D) High  switch:

• Adds 1000 M resistance in series with output.

• Simulates high impedance of pH electrodes.

Used to verify proper preampliﬁ er operation.

E) Adapter cable:

PN 3-2759.391 for use with the 2750 or 2760.

F) Bypass adapter cable:

PN 3-2759.390 (included with 2759) to connect directly to an instrument.

G) Mode selector switch:

Trigger automatic sensor recognition software in Signet pH/ORP instrumentation.

• Top = 1K for a Signet 8900 or 9900 instrument needing PT1000 temperature compensation input.

• Middle = 10K for ORP simulation.

• Bottom = 3K for Signet 5700 and 8750 instruments needing a 3K temperature compensation input.

H) 2750 Sensor Electronics

I) 2760 Preampliﬁ er

Signet 2759 pH/ORP Simulator and System Tester

1. Description

The Signet 2759 pH/ORP Simulator is a battery-powered millivolt generator that simulates pH values of 4, 7 and 10, plus ORP values of

± 700 mV. This device is useful as a troubleshooting aid and for general veriﬁ cation of system operation. It is not a substitute for periodic

system calibration with pH buffers or test solutions. Accessory adapter cables (sold separately) enable the 2759 to connect directly to

2750 pH/ORP Sensor Electronics or 2760 pH/ORP Preampliﬁ er. The adapters include a selector switch for pH or ORP simulation. The

switch triggers automatic sensor-recognition software in Signet pH/ORP instrumentation.

2. Speciﬁ cations

mV output accuracy: ............. ± 0.6 mV (± 0.01 pH)

pH system temperature simulation:

w/2750 adapter: ............... 1.1 K = 25 ºC (± 4 ºC)

w/2760 adapter: ............... 3 K = 25 ºC (± 4 ºC)

High  resistor value: ........... 1000 M

Battery: ................................. 9V alkaline

Life: 400 hours

Dimensions: .......................... 100 x 75 x 23 mm

(3.94 x 2.95 x 0.91 in.)

Weight: ................................. 120 grams (5 oz.)

+177 mV

0 mV

-177 mV

-700 mV

+700 mV

mV Value

1. Description

2. Speciﬁ cations

3. Troubleshooting ProcessPro, ProPoint and 2760 Preampliﬁ er

4. Troubleshooting 2750 pH/ORP Electronics

5. pH and ORP System Response Chart

3-2759.090 Rev. F 10/12 English

*3-2759.090*

English

+GF+

10K

ORP

V -

4-20

T -

T +

V +

Iso. Gnd

mV Input

Signet

Instrument

China RoHS

For more information go to www.gfsignet.com

Summary of content (4 pages)

PAGE 1
English Signet 2759 pH/ORP Simulator and System Tester *3-2759.090* 3-2759.090 Rev. F 10/12 English 1. 2. 3. 4. 5. Description Specifications Troubleshooting ProcessPro, ProPoint and 2760 Preamplifier Troubleshooting 2750 pH/ORP Electronics pH and ORP System Response Chart 1. Description The Signet 2759 pH/ORP Simulator is a battery-powered millivolt generator that simulates pH values of 4, 7 and 10, plus ORP values of ± 700 mV.
PAGE 2
Step 1: Routine maintenance and calibration using buffers • The most common problem in pH or ORP systems are related to electrode depletion or physical obstruction and fouling. • Perform routine electrode maintenance, including cleaning and inspection of the electrode, then calibrate the system using buffer solutions. See the electrode and 2760 Preamplifier manuals for more information. (V-) (V+) Black (T+) (T-) Red Green White (mV input) Brown Blue Silver (earth ground) A (iso. ground) 3.
PAGE 3
4. Troubleshooting 2750 pH/ORP Electronics Before using the 2759: • The most common cause of pH/ORP system problems is electrode depletion. • Perform routine electrode maintenance, including cleaning and inspection of the electrode, then calibrate the system. • See the electrode and 2750 Sensor manuals for detailed information. If the problem persists, or to verify general system operation: This test procedure requires the 3-2759.391 adapter cable. Connecting the 2759 output to the 3-2759.
PAGE 4
5. pH and ORP System Response Chart 2759 Button pH System Response ORP System Response* –700 mV 2750 current output: 5700 pH display: 8750 pH display: 20 mA (max. output) 15 pH 15 pH 10 pH (–177 mV) 2750 current output: All pH displays: 15.4 mA 10 pH 2750 current output: All ORP displays: 8.4 mA –177 mV 7 pH (0 mV) 2750 current output: All pH displays: 12 mA 7 pH 2750 current output: All ORP displays: 9.3 mA 0 mV 4 pH (+177 mV) 2750 current output: All pH displays: 8.