ENMET SMARTLOGGER - Manual (Page 8)

ENMET Corporation SMART LOGGER
2
2.0 Start-Up 2.0 Start-Up
2.1 Power Supply
The power supply is either a 9v standard or alkaline primary cell type 6F22, or a rechargeable battery. The instrument is
supplied from the factory with the NCMH battery and a charger. The instrument is certified for a use in a flammable
atmosphere only when it is equipped with a specified primary cell or battery.
Since the SMART BLOCK draws a small amount of bias current when the instrument is off, it is advisable to charge the
instrument when it is not used, even for a relatively short period of time. An instrument with a rechargeable battery, when
off, depletes a fully charged battery in approximately 7 days. If the rechargeable battery is deep discharged repeatedly, the
energy capacity of the battery is reduced. An instrument with an alkaline battery, when off, depletes a new battery in
approximately 30 days.
2.2 Installation of the Battery
The battery is shipped as a separate item. To install it, unscrew the rear cover mounting screw to access to the battery
compartment. The cell is connected to the circuit with a spring loaded connector. Charge the battery after installing it; see
below.
2.3 Smart Block Acclimation
The battery has not been installed, so the SMART BLOCK does not draw a bias current during shipment. After installing the
battery, the SMART BLOCK must become acclimated before use. The time required to acclimate a SMART BLOCK
depends upon the type of SMART BLOCK, and ranges from a few minutes for a CO or H2S SMART BLOCK to a day for
an HCl SMART BLOCK. The SMART BLOCK is being acclimated while the instrument is off. When the instrument is
turned on and not auto zeroed, an acclimated SMART BLOCK gives a stable reading near zero to within ± 10% of the upper
range of the instrument. Do not auto zero an instrument until the cell is acclimated; see below.
2.4 Changing
Plug the charger into a 110VAC wall socket. With the instrument off, plug the charger connector into the CHARGE/PRINT
connector on the top of the SMART LOGGER; charge the battery for 12-14 hours. When the instrument is turned on and
then the charger is disconnected, the auto zero feature is automatically activated. If auto zero is not desired, leave the
instrument off when disconnecting the charger. The instrument must be in a clean atmosphere when auto zero is activated.
2.5 Installation of Change of a Smart Block
Accomplish this operation carefully in a safe atmosphere.
- Turn the instrument off. Remove the cover, and extract the SMART BLOCK.
- Plug in the new SMART BLOCK. The connector is keyed. Replace the cover.
- Allow the SMART BLOCK to acclimate; do not auto zero until it is.
2.6 Earphone
An earphone may be adapted for use with the CHARGE/PRINT mini-DIN plug. The earphone chosen must be
commensurate with intrinsic safety requirements. See Section VI, below, for maximum allowable inductance and
capacitance.
2.7 Remote Sampling
The measurement of toxic gas concentrations, before entry into a confined space or in places where the access is difficult, can
be done with a remote sampling probe.
- In the ring groove pro vided for this purpose, install the pneumatic remote sampling system as indicated in Figure 2.