Thermo Fisher Scientific Alpha RES 1000 - Manual (Page 20)

Operating Instructions Alpha RES 1000
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7.3 Control Relay A/Control Relay B (SP1/SP2) sub-function
SP1 option sets operating parameters for Relay A; and SP2 for relay B. Since these groups have the same
set-up parameters, they are described together.
7.3.1 Entering the Set point 1 (Set point 2) sub-function
1) Enter Advanced Set-up mode. Push the ENTER key and
scroll to Advanced Set-up security code “22”. Push the
ENTER key again.
2) Press the Δ or ∇ keys to scroll until the upper display
shows SP1 (SP2).
7.3.2
Selecting the set point values
This lets you choose the value that will cause your controller to
activate (Default: SP1 = 1.00 m
Ω; SP2 = 19.00 mΩ).
1) Follow directions in 7.3.1 to enter Control Relay mode. If
you are in this mode, skip to step 2.
2) Press the ENTER key. The upper display shows the
current set point value and the lower display shows SP1
(SP2).
3) Press the Δ or ∇ keys to select your value for Set point 1
(Set point 2). Your controller will activate at the value you
select.
SP 1
Lo
SP 1
0.20
HYS
0
On.d
0
Of.d
1.00
SP 1
SP 1
Lo
SP 1
1.00
mΩ
SP 1
HOLD SETUP
HOLD SETUP
HOLD SETUP
HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP
4) Press the ENTER key to confirm your selection.
5) Proceed to 7.3.3, or return to Measurement mode by pressing the
Δ and ∇ keys simultaneously (escape).
7.3.3 Choosing High or Low set points
When ‘Lo’ is selected, the control relay is activated when the value is lower than SP1 (SP2). When ‘Hi’ is
selected, the control relay is activated when the value is higher than the set point (SP1/SP2). Using both SP1
and SP2, you can select lo/lo, lo/hi, hi/lo, or hi/hi set points (Default: SP1 = Lo; SP2 = Hi).
1) Follow directions in 7.3.1 to enter Control Relay mode.
2) Press the ENTER key until the upper display shows Lo or Hi (for low or high set point) and the lower
display shows SP1 (SP2).
3) Press Δ or ∇ keys to select low (lo) or high (hi) set point for SP1 (SP2). Press ENTER key.
4) Proceed to 7.3.4, or return Measurement mode by pressing Δ and ∇ keys simultaneously (escape).
7.3.4 Selecting a hysteresis (dead band) value (0.000 to 0.200 m Ω or 0.00 to 2.00 mΩ)
Hysteresis prevents rapid contact switching if the value is fluctuating near the set point. It does this by
overshooting the set point value to a specified hysteresis value (default is 0.20 m
Ω). You can set the hysteresis
value from 0.000 to 0.200 m Ω or 0.00 to 2.00 mΩ.