Electro-Chemical Devices (ECD) HYDRA Ammonium - Manual (Page 21)

HYDRA NH
4
+ -N Page 13
Timer 1: periodic
←Clock ◄ CALIBRATE ►
Per 0d00 :00 :00 Cleaning Timer
Now 0 00 :00 :00 (Per sets the time
On 0 00 :00 :00 between cleaning
Off 0 00 :00 :00 cycles) ◄ CALIBRATE ►
(Set the Period to 15 minutes then every ¼ hour the Now
Clock will reset to 0:00:00 and trigger the On Timer which is
set at 0:00:00, starting the cleaning cycle.)
Per 0d00 :15 :00
Now 0 00 :00 :00
On 0 00 :00 :00
Off 0 00 :00 :00 To adjust the value use the CALIBRATE ◄ or ► to move
cursor. Use the ▲or▼ to adjust the integer value, then
MENU SELECT ▼ (save the Value)
MENU SELECT ▼, MENU SELECT ▼, MENU SELECT ▼
Per 0d00 :15 :00
Now 0 00 :00 :00 (Set the Off time
On 0 00 :00 :00 at 30 seconds)
Off 0 00 :00 :30 ◄ CALIBRATE ► (enter the Off line, the duration of the
cleaning cycle) To adjust the value use the CALIBRATE ◄ or
►
to move cursor. Use the ▲or▼ to adjust the integer
value, then MENU SELECT ▼ (save the Value)
Timer 2: oneshot↑
←timer 1←clock ◄ CALIBRATE ►
4-20 mA hold time after cleaning cycle, (CT + 1 minute)
Now 0 00 :00 :00 Manual Mode Timer
On 0 00 :00 :00 (Hold Function)
Off 0 00 :01 :30 (Set at 1 min 30 sec) MENU SELECT ▼, MENU SELECT ▼, ◄ CALIBRATE ►
To adjust the value use the CALIBRATE ◄ or ► to move
cursor. Use the ▲or▼ to adjust the integer value.
Ks .120
K+ comp Off MENU SELECT ▼ NH
4
electrode selectivity ratio for K +
NH
4
reading – 0.120 (K + reading) = NH
4
concentration
Ks .120
K+ comp Off MENU SELECT ▼ K
+
compensation should be Off for
Calibration and On for Measurement
TC .333 %/°C
Isopot 20.0 mV
Equilib 9.24 pH
Dissoc 1.000 Off MENU SELECT ▼
Temperature Compensation (no adjustments needed)
TC .333 %/°C
Isopot .0 mV ** Mandatory **
Equilib 9.24 pH ** Input **
Dissoc 1.000 Off ◄ CALIBRATE ► (Enter Iso-Potential Entry line)
**Iso-Potential value supplied with each electrode**
TC .333 %/°C
Isopot 20.0 mV
Equilib 9.24 pH
Dissoc 1.000 Off To adjust the value use the CALIBRATE ◄ or ► to move
cursor. Use the ▲or▼ to adjust the integer value.
TC .333 %/°C
Isopot 187.0 mV
Equilib 9.24 pH
Dissoc 1.000 Off MENU SELECT ▼ (accept the Value)
MENU SELECT ▼
Equilibrium value, No Input Needed
(Equilib= pH value equal to the pKa, the acid dissociation
constant, where [NH
4
= NH
3
+ H
+
])
TC .333 %/°C
Isopot 187.0mV
Equilib 9.24 pH
Dissoc 1.000 On MENU SELECT ▼
Dissoc = the pH correction factor for the [NH
4
↔ NH
3
+ H + ]
dissociation , (the Measured NH
4
)/Dissoc = Total NH
4
-N
(should be on at all times)
Noise Filter 5
CALIBRATE ▼ (return to Home Screen)