Hach 003070HY, User Manual

Maintenance & Calibration

Page 25

Section 5

Maintenance & Calibration

5.1 Cleaning the Instrument

Clean the case, screen, and other components (except connectors and plugs) with a slightly wet 
cloth or cotton swab. Use soap to remove grease spots. 

5.2 Recharging the Internal Battery

DANGER
Never connect the Surveyor 4a to a power source which exceeds 15 volts or fatal electrical 
shock may occur. To avoid shock hazards, do not use AC (110 and 220 VAC 12VDC power 
adapters) to power the Sonde. Use battery power when deploying a Sonde outdoors. If an 
AC power is used, a Ground Fault Interrupt (GFI) device must be used. GLI installation must 
be done by a licensed electrician. 

The Surveyor 4a must be powered on (with charger cable and a power adapter properly 
connected) and left on in order to charge. 

We recommend charging the Surveyor 4a when the instrument internal battery voltage (IBV) 
reaches 6.5 volts. 

The recharge time depends on the percent left (IB%) in the battery. Charging is complete in three 
and a half hours. 

When the Surveyor 4a is first received, we recommend that a complete discharge cycle is 
performed and then recharge the Surveyor 4a. 

1.

Connect the Surveyor 4a charger cable to the Surveyor 4a. Attach the 110 or 220 power 
adapter to the other end of the charger cable. For the 220 power adapter, connect the 
country’s corresponding power cord to the IEC 320 connector. 

2.

Turn the Surveyor 4a on. 

3.

A low external power supply screen will be displayed if the Surveyor 4a is connected to an 
external power source that is providing insufficient voltage or poor connections where made. 
Recheck all connections and try again. Insert the loose end of the power adapter to the 
country’s corresponding power cord into the wall outlet. Press any key on the Surveyor 4a to 
continue. 

4.

After the welcome screen, the following screen will be displayed. The Estimated Time to 
Charge (ETTC) and estimated current charge level of the internal battery back in percent will 
be displayed (IB%). The ETTC value will decrease as the full charge approaches. The IB% 
value will change until it reaches fill recharge capacity. 

Note: 

IB% is an estimate. Do not disconnect the Surveyor 4a from charging until prompted. Early disconnect 

can severely reduce the operating time. 

5.

The battery will automatically start to recharge. Press the Suspend key to pause the recharge 
process. Press Resume to restart the recharge process. During the recharge process, some 
of the original data will reset. Press the All Stats key to provide more detailed information on 
the recharge process. 

Note: 

When the All Stats key is selected, it will be replaced with the Est Only key, which brings back the first 

charge mode menu.