Introduction; General; Specifications - TECPEL 870 Operation Manual

9. Trouble Shooting
? Power on but no display: Check the battery are in place and making good contact or correct
polarity, replace a new battery.
? Unstable reading: Clean the probe and recalibrate or make sure sample entirely covers the sen-
sor, or replace a new probe and re-calibrate if you find a broken probe.
? Slow response: Clean probe by immersing the electrode in tap water for 10-15 minutes, then
thoroughly rinse with distilled water or use a general purpose electrode cleaner.
? LCD show E2 at ATC Range: The temperature of solution over 100°C (212°F).
? LCD show E3 at ATC Range: The temperature of solution under 0°C (32°F).
10. Battery Replacement
1. Power is supplied by three 1.5V(AAA size) batteries.
2. The " " appears on the LCD display when replacement is needed. To replace the batteries,
remove the screw from the back of the meter and lift off the battery cover.
3. Install three 1.5V batteries.
4. When not use for long time remove battery.
5. Don't keep in place with high Temp. or high humidity.
11. Cleaning
Periodically wipe the case with a damp cloth and detergent, do not use abrasives of solvents.
Ver. 1.1 06/20/07
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1. Introduction

This instrument is a portable easy to use 3 ½ digit, compact-sized pH/mV and temperature me-
ter.
Dual display pH (mV) & Temperature.
Auto power off function to extend battery life.
Automatic Temperature Compensation and Manual Compensation.
RS 232 Interface with Windows Software.

2. General

Low battery indication: The " " is displayed when the battery voltage drops below the
operating level.
Accuracy: Stated accuracy at 23°C±5°C (79°F±9°F), < 70% relative humidity.
Operating environment:
Meter: 0°C to 50°C (32°F to 122°F) at < 70% relative humidity.
pH electrode: 0°C to 80°C (32°F to 176°F).
Storage environment: -20°C to 60°C (-4°F to 140°F) at < 80% relative humidity with battery
and pH electrode removed form meter.
Measurement rote: 1 time per second, nominal.
EMC-instrument unspecified for use in EMC field ≥ 0.5V/m.
Battery: 3 pcs 1.5V (AAA size) UM-4 R03.
Battery life: 100 hours typical with carbon zinc battery.
Dimensions: 155.5mm(H) x 48mm(W) x 35mm(D).
Weight: 180g.
Accessories: Instruction manual, Software, Batteries, RS232 cable, pH4.01, pH7.00 and
pH10.01 buffer solution, pH electrode, Temperature probe, screwdriver.
The screwdriver: It is used to select temperature in °C or °F and CAL position.
Option Accessories: pH electrode, pH4.01, pH7.00 and pH10.01 buffer solution, Carrying case.

3. Specifications

Accuracy stated at ambient temperature 18 to 28°C(65 to 82°F), <70% R.H.
Temperature Coefficient: 0.1 times the applicable accuracy per °C from 0°C to 18°C and 28°C to
50°C(32°F to 64°F and 82°F to 122°F)
Measurement Range
pH 0 .00 to 14.00
mV -1000 to 1000mV(Auto)
Temp(°C) 0 to 80°C
Temp(°F) 32 to 176°F
*Not include pH electrode error
Ω
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Input impedance: 10
Note: Probe can't be interchanged.
Resolution Accuracy
0.01pH ±0.03pH*
0.1mV/1mV ±(0.5% rdg+2dgts)
0.1°C ±1°C
0.1°F ±2°F
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