Hach Surveyor 4a, Руководство пользователя

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Battery Replacement
Page 26
Maintenance & Calibration
6. The Surveyor 4a will display “Charging Complete! Disconnect Charger for Normal Operation.
Press any key...” when the charge event is complete.
Note: Charging is not complete when ETTC=0 or IB%=100. Charging is complete when
Δ
t equals or exceeds
three and a half hours, –
Δ
V equals or exceeds 60 mV, or
Δ
TCO equals or exceeds 15 °C.
7. When IBP is fully recharged, disconnect the Surveyor 4a charge cable. The Surveyor 4a
screen will display the NoConn message.
5.3 Battery Replacement
5.3.1 Internal Battery Replacement
CAUTION
To prevent damage to internal components, avoid placing the battery next to a
water source.
Replace the batteries on a clean, dry working surface.
1. Disconnect any cable connections to the Surveyor 4a.
2. Turn the Surveyor 4a upside down on the working surface.
3. Unscrew the four retaining screws with a Phillips screwdriver. Do not pull the screws
completely out.
4. Lift and remove the back panel from the bottom of the Surveyor 4a.
5. Remove the old batteries from the compartment.
6. Insert the new battery, aligning the notches on the battery with the notches on the Surveyor 4a
case.
7. Lightly coat the o-ring around the battery compartment with silicone grease. Do not use any
other kind of grease.
8. Place the back panel over the battery compartment and screw the retaining screws. Do not
overtighten the screws.
Table 3 All Stats Information
Display Description
Δ
t
The elapsed time from the beginning of the charging event. Charging stops when
Δ
t exceeds approximately three
and a half hours.
Vpeak The maximum voltage at any time during the charging event.
–
Δ
V The negative change of voltage (Vpeak minus current voltage reading). Charging stops when –
Δ
V exceeds 60 mV.
Δ
TCO
The change in temperature from the beginning of the charging event to the current time. Charging stops when
Δ
TCO exceeds 15 °C.
Init Initial readings when the charge event was started.
Current Current reading.
Parameters Time, temperature, voltage (Volts), and battery charge capacity (%)