Extech Instruments NON-DISPLAY PORTABLE User's Guide download pdf (Page 4)

DO700 V1.0 8/09

Display Description

1. Measurement type icons

2. Measured reading

3. 888 (Stored data serial number), M+ (measurement to be stored icon), RM (reading to

be recalled icon)

4. Units of measure

5. Temperature reading

6. Stable measurement icon

7. Calibration icons

8. Low battery icon

Keypad Description

ON/OFF Power Key

Calibration Key

a) When taking a measurement, press this key to enter the calibration mode

b) When in the programming mode, press this key to change the displayed

number or the ON/OFF state

Mode Key

a) In Dissolved Oxygen or Conductivity mode, press to enter the P1 programming

parameter. Subsequent presses will scroll through the available parameters

b) In pH mode, momentary presses toggle between pH and mV modes. Press and

hold the MODE key to enter the P1 programming parameter. Subsequent

presses will scroll through the available parameters

Backlight and ENTER Key

a) In the measurement mode, momentary presses toggle the backlight on and off

b) When in the programming or calibration mode, press to ENTER data

c) When in the pH mode, press and hold to change the resolution 0.01 to 0.1pH

d) When in the Conductivity mode, press and hold to scroll through the TDS,

Salinity, Resistivity, and Conductivity modes

e) When in DO mode, press and hold to select the unit of measure (mg/L > ppm >

%). Release the key when the desired unit is displayed

MEMORY STORE and RECALL Key

a) In the measurement mode, momentary presses store the displayed readings.

Press and hold for at least 2 seconds to recall a saved reading

b) In programming mode, press to change the displayed number or ON/OFF state

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Extech Instruments NON-DISPLAY PORTABLE User's Guide Page 4