Rs232 Interface; Troubleshooting Guide / Service; Cleaning And Maintenance - Labnet D1100 Instruction Manual

6. The unit will then begin to automatically adjust its operating temperature to your
original set point with the re-calibration factor included. Allow sufficient time
for the unit to re-equilibrate and then again compare the thermometer or sensor
reading to the calibrated display. They should closely match. If not, repeat the
calibration procedure.
* Thermometers used for calibration purposes should have a written calibration
certificate and be traceable back to NIST or some other certified body. General lab
thermometers are often not accurate enough for calibration work.

7.0 RS232 Interface

The Digital Dry Baths have an RS232 unidirectional data port. An optional software
disk and interface cable are available which allow a user to use a desk top or lap top
computer to record and/or print a record or the temperature profile produced by the
dry bath.
8.0 Troubleshooting Guide / Service (Labnet Service 1-888-LABNET-1)
Problem
Display / LEDs do not light up
Unit not heating
Unit display overshoots
set point in heat-up
Block or Sample temp not
same as display temp.

9.0 Cleaning and Maintenance

Make sure that the dry bath and block are cool and the power cord disconnected
before performing any cleaning or maintenance. The dry bath may be cleaned with
a moist cloth containing a mild soap solution. Do not immerse the dry bath in water
or any liquid.
The blocks may also be cleaned in a mild soapy solution. Be sure that all items have
thoroughly dried before attempting to connect the cord or use the unit.
Spills: In the event liquid is accidentally spilled into the bath or well area, disconnect
the plug from the outlet and turn the unit upside down to minimize liquid contact
with the internal components. Remove the bottom cover and inspect to assure
liquid has not contacted heater elements, electronic controls, or connectors. Have
qualified service technician clean the unit and replace any damaged parts.
Explanation / Solution
1. Check power cord & outlet
2. Check ON / OFF switch
3. Check fuse
4. Call service
1. Is set point below room temp
2. Is "START" LED illuminated
3. Press "START" key
4. Call service
1. Normal operation. Display
overshoots on initial heat-up but block
and sample do not overshoot. See
Operation section of this manual.
1. Is unit in heating mode
2. Is unit sitting in draft
3. Check accuracy of thermometer
4. Is thermometer making good contact
5. Follow calibration procedure
3