Lakeside Foodservice 832 Installation Manual

Mechanical Calibration (required only on model 822):

1. With the power turned off

, install a jumper on terminal strip TB1 between terminals 0 and 1.

2. Adjust the 822's mechanical zero (needle pointing to zero with power off) by turning the screw located directly behind the meter movement.

Power Supply Board Calibration:

1. Remove the previously installed jumper (Mechanical Calibration step 1).

2. Place the common lead (-) of a Digital Volt Meter (DVM) on TB1 terminal 1.

3. Place the positive lead (+) of the DVM on pin 1 of IC U1.

4. Turn on the power.

5. Adjust R13 on the power supply board until the DVM reads 10.20 VDC ± 0.01 VDC.

Analog Board Calibration:

1. Connect the calibrator/simulator via the patch cord or fixed resistors to TB1 terminals 1 thru 4.

2. Dial X1 on 822/832's range switch .

3. Place the DVM's common lead (-) on TB1 terminal 1, and the positive lead (+) on TB1 terminal 0.

4. Adjust R1 on analog PCB until DVM reads 5.00 VDC ± 0.05 VDC.

5. Turn the 822/832's range switch to "CHECK" and hold it at this position.

6. Adjust R29 on analog PCB until DVM reads:

For 822: 10.00 VDC ± 0.05 VDC For 832: 5.00 VDC ± 0.05 VDC

Digital Board Calibration (required only on model 832):

1. While holding the 832's range switch in the "CHECK" position, turn R1 on the digital PCB until the 832's digital display reads 10.0 ± 0.1.

Calibration & Accuracy Verification Procedures

For 822 & 832 Meters

THORNTON

Leading Pure Water Analytics

www.thorntoninc.com

For the most current product information visit:

email: info@thorntoninc.com www.thorntoninc.com

822_cal.doc Rev C. Updated logo & address 09/03

Mettler-Toledo Thornton, Inc.

36 Middlesex Turnpike Bedford, MA 01730 USA Telephone: +1-781-301-8600 Toll-Free: 1-800-510-PURE

Customer/Technical Service

Telephone: +1-781-301-8690 Toll-Free: 1-800-642-4418 Cust Service Fax: +1-781-271-0214 Tech Service Fax: +1-781-271-0675



Mettler-Toledo Thornton, Inc. – Subject to Technical Changes

10 MΩΩ Calibrator/simulator Pinout:

100.0 KΩΩ between pins 1 and 2

10.0 KΩΩ between pins 2 and 3

180.0 KΩΩ between pins 2 and 4

NOTE: It may be necessary to connect a ground wire internally

between earth ground (Pin 9, TB2) and cell ground (Pin 1, TB1) to avoid ground pickup problems.

10 K

ΩΩ

100 K

ΩΩ

10 Meg-Ohm

Simulation

180 K

ΩΩ

TB1